/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:13:19,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:13:19,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:13:19,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:13:19,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:13:19,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:13:19,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:13:19,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:13:19,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:13:19,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:13:19,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:13:19,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:13:19,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:13:19,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:13:19,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:13:19,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:13:19,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:13:19,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:13:19,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:13:19,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:13:19,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:13:19,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:13:19,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:13:19,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:13:19,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:13:19,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:13:19,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:13:19,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:13:19,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:13:19,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:13:19,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:13:19,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:13:19,192 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:13:19,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:13:19,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:13:19,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:13:19,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:13:19,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:13:19,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:13:19,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:13:19,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:13:19,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:13:19,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:13:19,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:13:19,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:13:19,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:13:19,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:13:19,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:13:19,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:13:19,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:13:19,197 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:13:19,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:13:19,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:13:19,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:13:19,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:13:19,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:13:19,555 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:13:19,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2021-05-06 07:13:19,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a77f6d6b/16884d042c3648be912a63fd8baef174/FLAG6514c9b1f [2021-05-06 07:13:19,986 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:13:19,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2021-05-06 07:13:20,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a77f6d6b/16884d042c3648be912a63fd8baef174/FLAG6514c9b1f [2021-05-06 07:13:20,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a77f6d6b/16884d042c3648be912a63fd8baef174 [2021-05-06 07:13:20,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:13:20,023 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:13:20,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:13:20,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:13:20,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:13:20,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0bb235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20, skipping insertion in model container [2021-05-06 07:13:20,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:13:20,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:13:20,195 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_valuebound2.c[596,609] [2021-05-06 07:13:20,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:13:20,263 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:13:20,276 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_valuebound2.c[596,609] [2021-05-06 07:13:20,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:13:20,309 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:13:20,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20 WrapperNode [2021-05-06 07:13:20,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:13:20,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:13:20,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:13:20,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:13:20,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:13:20,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:13:20,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:13:20,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:13:20,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (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 07:13:20,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:13:20,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:13:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:13:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:13:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:13:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:13:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:13:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:13:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:13:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:13:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 07:13:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:13:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:13:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:13:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:13:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:13:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:13:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:13:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:13:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:13:20,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:13:20,711 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:13:20,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:13:20 BoogieIcfgContainer [2021-05-06 07:13:20,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:13:20,724 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:13:20,724 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:13:20,725 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:13:20,727 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:13:20" (1/1) ... [2021-05-06 07:13:20,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:13:20 BasicIcfg [2021-05-06 07:13:20,750 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:13:20,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:13:20,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:13:20,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:13:20,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:13:20" (1/4) ... [2021-05-06 07:13:20,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77884c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:13:20, skipping insertion in model container [2021-05-06 07:13:20,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:13:20" (2/4) ... [2021-05-06 07:13:20,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77884c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:13:20, skipping insertion in model container [2021-05-06 07:13:20,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:13:20" (3/4) ... [2021-05-06 07:13:20,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77884c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:13:20, skipping insertion in model container [2021-05-06 07:13:20,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:13:20" (4/4) ... [2021-05-06 07:13:20,756 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound2.cJordan [2021-05-06 07:13:20,764 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:13:20,768 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:13:20,781 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:13:20,804 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:13:20,805 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:13:20,805 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:13:20,805 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:13:20,805 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:13:20,805 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:13:20,805 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:13:20,805 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:13:20,820 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 07:13:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:13:20,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:20,827 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 07:13:20,827 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:20,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2021-05-06 07:13:20,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:20,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370190613] [2021-05-06 07:13:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:13:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:13:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,052 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 07:13:21,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370190613] [2021-05-06 07:13:21,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370190613] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:13:21,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:13:21,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:13:21,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551044117] [2021-05-06 07:13:21,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:13:21,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:13:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:13:21,070 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 07:13:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:21,185 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-06 07:13:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:13:21,187 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 07:13:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:21,193 INFO L225 Difference]: With dead ends: 36 [2021-05-06 07:13:21,193 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 07:13:21,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:13:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 07:13:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 07:13:21,229 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 07:13:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-06 07:13:21,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-06 07:13:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:21,232 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-06 07:13:21,232 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 07:13:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-06 07:13:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:13:21,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:21,233 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 07:13:21,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:13:21,233 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2021-05-06 07:13:21,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:21,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11103628] [2021-05-06 07:13:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:13:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:13:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,405 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 07:13:21,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11103628] [2021-05-06 07:13:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11103628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:13:21,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:13:21,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:13:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399275383] [2021-05-06 07:13:21,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:13:21,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:13:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:21,408 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 07:13:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:21,735 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:13:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:13:21,736 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 07:13:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:21,737 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:13:21,737 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:13:21,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:13:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:13:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:13:21,748 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 07:13:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:13:21,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-06 07:13:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:21,755 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:13:21,755 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 07:13:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:13:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:13:21,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:21,756 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 07:13:21,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:13:21,756 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2021-05-06 07:13:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:21,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307642116] [2021-05-06 07:13:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:21,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:21,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234392093] [2021-05-06 07:13:21,773 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 07:13:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:21,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:13:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:21,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:21,987 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 07:13:21,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:21,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307642116] [2021-05-06 07:13:21,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:21,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234392093] [2021-05-06 07:13:21,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234392093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:13:21,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:13:21,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:13:21,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250023598] [2021-05-06 07:13:21,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:13:21,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:13:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:13:21,989 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 07:13:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:22,084 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-06 07:13:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:13:22,086 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 07:13:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:22,088 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:13:22,088 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:13:22,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:13:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-06 07:13:22,098 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 07:13:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-05-06 07:13:22,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2021-05-06 07:13:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:22,099 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-05-06 07:13:22,099 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 07:13:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-05-06 07:13:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:13:22,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:22,103 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 07:13:22,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:13:22,327 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2021-05-06 07:13:22,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:22,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200835888] [2021-05-06 07:13:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:22,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:22,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724171775] [2021-05-06 07:13:22,335 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 07:13:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:13:22,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:22,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:22,529 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 07:13:22,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:22,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200835888] [2021-05-06 07:13:22,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:22,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724171775] [2021-05-06 07:13:22,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724171775] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:13:22,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:13:22,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:13:22,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361273235] [2021-05-06 07:13:22,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:13:22,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:13:22,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:13:22,532 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 07:13:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:22,593 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-06 07:13:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:13:22,593 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 07:13:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:22,597 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:13:22,597 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 07:13:22,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 07:13:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-05-06 07:13:22,615 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 07:13:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-05-06 07:13:22,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2021-05-06 07:13:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:22,619 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-05-06 07:13:22,620 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 07:13:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-05-06 07:13:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:13:22,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:22,622 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 07:13:22,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:22,825 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2021-05-06 07:13:22,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:22,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354888029] [2021-05-06 07:13:22,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:22,840 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:22,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153627578] [2021-05-06 07:13:22,841 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 07:13:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:22,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:13:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:23,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:23,038 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 07:13:23,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:23,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354888029] [2021-05-06 07:13:23,039 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:23,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153627578] [2021-05-06 07:13:23,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153627578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:13:23,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:13:23,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:13:23,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693888949] [2021-05-06 07:13:23,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:13:23,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:23,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:13:23,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:13:23,045 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 07:13:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:23,128 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-06 07:13:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:13:23,129 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 07:13:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:23,131 INFO L225 Difference]: With dead ends: 64 [2021-05-06 07:13:23,131 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:13:23,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:13:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 07:13:23,146 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 07:13:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-06 07:13:23,147 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2021-05-06 07:13:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:23,148 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-06 07:13:23,148 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 07:13:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-06 07:13:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 07:13:23,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:23,149 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 07:13:23,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:23,373 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:23,374 INFO L82 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2021-05-06 07:13:23,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:23,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121409683] [2021-05-06 07:13:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:23,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:23,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717497489] [2021-05-06 07:13:23,383 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 07:13:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:13:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:23,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:23,613 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 07:13:23,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121409683] [2021-05-06 07:13:23,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717497489] [2021-05-06 07:13:23,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717497489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:23,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:23,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:13:23,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615119472] [2021-05-06 07:13:23,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:13:23,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:23,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:13:23,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:23,615 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 07:13:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:23,708 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-05-06 07:13:23,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:13:23,709 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 07:13:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:23,714 INFO L225 Difference]: With dead ends: 79 [2021-05-06 07:13:23,714 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 07:13:23,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 07:13:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-06 07:13:23,721 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 07:13:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-05-06 07:13:23,722 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 49 [2021-05-06 07:13:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:23,722 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-05-06 07:13:23,722 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 07:13:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-05-06 07:13:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 07:13:23,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:23,724 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 07:13:23,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:23,933 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2021-05-06 07:13:23,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:23,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546942820] [2021-05-06 07:13:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:23,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:23,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121435335] [2021-05-06 07:13:23,950 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 07:13:24,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:13:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:13:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,179 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 07:13:24,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:24,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546942820] [2021-05-06 07:13:24,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:24,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121435335] [2021-05-06 07:13:24,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121435335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:24,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:24,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:13:24,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553370950] [2021-05-06 07:13:24,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:13:24,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:24,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:13:24,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:24,181 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 07:13:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:24,286 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-06 07:13:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:13:24,287 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 07:13:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:24,288 INFO L225 Difference]: With dead ends: 83 [2021-05-06 07:13:24,288 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 07:13:24,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 07:13:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-05-06 07:13:24,293 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 07:13:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-05-06 07:13:24,294 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2021-05-06 07:13:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:24,295 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-05-06 07:13:24,295 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 07:13:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-05-06 07:13:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 07:13:24,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:24,296 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 07:13:24,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:13:24,519 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2021-05-06 07:13:24,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:24,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894775065] [2021-05-06 07:13:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:24,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:24,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771446765] [2021-05-06 07:13:24,529 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 07:13:24,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:13:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:13:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:24,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:24,739 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 07:13:24,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:24,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894775065] [2021-05-06 07:13:24,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:24,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771446765] [2021-05-06 07:13:24,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771446765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:24,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:24,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:13:24,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73274302] [2021-05-06 07:13:24,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:13:24,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:24,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:13:24,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:24,742 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 07:13:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:24,840 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-05-06 07:13:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:13:24,840 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 07:13:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:24,843 INFO L225 Difference]: With dead ends: 87 [2021-05-06 07:13:24,843 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:13:24,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:13:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:13:24,850 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 07:13:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-06 07:13:24,851 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 59 [2021-05-06 07:13:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:24,851 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-06 07:13:24,852 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 07:13:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-06 07:13:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 07:13:24,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:24,853 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 07:13:25,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:25,073 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 766739444, now seen corresponding path program 4 times [2021-05-06 07:13:25,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:25,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198838254] [2021-05-06 07:13:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:25,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:25,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073432898] [2021-05-06 07:13:25,094 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 07:13:25,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:13:25,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:13:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:25,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,275 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 07:13:25,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:25,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198838254] [2021-05-06 07:13:25,276 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:25,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073432898] [2021-05-06 07:13:25,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073432898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:25,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:25,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:13:25,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995072683] [2021-05-06 07:13:25,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:13:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:13:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:13:25,278 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 07:13:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:25,357 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-05-06 07:13:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:13:25,357 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 07:13:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:25,358 INFO L225 Difference]: With dead ends: 90 [2021-05-06 07:13:25,358 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 07:13:25,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 07:13:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 07:13:25,363 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 07:13:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-06 07:13:25,364 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 64 [2021-05-06 07:13:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:25,364 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-06 07:13:25,364 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 07:13:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-06 07:13:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 07:13:25,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:25,365 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 07:13:25,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:25,581 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2021-05-06 07:13:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336233709] [2021-05-06 07:13:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:25,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:25,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371511518] [2021-05-06 07:13:25,588 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 07:13:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:13:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:25,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:25,910 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 07:13:25,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336233709] [2021-05-06 07:13:25,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371511518] [2021-05-06 07:13:25,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371511518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:25,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:25,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:13:25,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654882014] [2021-05-06 07:13:25,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:13:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:13:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:25,912 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 07:13:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:26,015 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-05-06 07:13:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:13:26,016 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 07:13:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:26,017 INFO L225 Difference]: With dead ends: 93 [2021-05-06 07:13:26,017 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 07:13:26,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:13:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 07:13:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 07:13:26,021 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 07:13:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-05-06 07:13:26,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 75 [2021-05-06 07:13:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:26,023 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-05-06 07:13:26,023 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 07:13:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-05-06 07:13:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 07:13:26,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:26,024 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 07:13:26,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 07:13:26,244 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2023420382, now seen corresponding path program 5 times [2021-05-06 07:13:26,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:26,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129668187] [2021-05-06 07:13:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:26,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:26,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482555054] [2021-05-06 07:13:26,262 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 07:13:26,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 07:13:26,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 07:13:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:26,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:26,575 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 07:13:26,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129668187] [2021-05-06 07:13:26,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482555054] [2021-05-06 07:13:26,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482555054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:26,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:26,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:13:26,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247083910] [2021-05-06 07:13:26,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:13:26,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:13:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:13:26,578 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 07:13:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:26,866 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-05-06 07:13:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:13:26,867 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 07:13:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:26,869 INFO L225 Difference]: With dead ends: 114 [2021-05-06 07:13:26,869 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 07:13:26,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:13:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 07:13:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-05-06 07:13:26,879 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 07:13:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-05-06 07:13:26,880 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 76 [2021-05-06 07:13:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:26,880 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-05-06 07:13:26,880 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 07:13:26,880 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-05-06 07:13:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 07:13:26,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:26,882 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 07:13:27,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:27,105 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2021-05-06 07:13:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:27,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224740981] [2021-05-06 07:13:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:27,113 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:27,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657703597] [2021-05-06 07:13:27,113 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 07:13:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:13:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:27,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:27,478 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 07:13:27,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:27,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224740981] [2021-05-06 07:13:27,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:27,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657703597] [2021-05-06 07:13:27,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657703597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:27,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:27,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:13:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18553763] [2021-05-06 07:13:27,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:13:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:27,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:13:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:27,480 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 07:13:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:27,576 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-05-06 07:13:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:13:27,576 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 07:13:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:27,578 INFO L225 Difference]: With dead ends: 107 [2021-05-06 07:13:27,578 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 07:13:27,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:13:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 07:13:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 07:13:27,582 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 07:13:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-05-06 07:13:27,582 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 80 [2021-05-06 07:13:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:27,583 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-05-06 07:13:27,583 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 07:13:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-05-06 07:13:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 07:13:27,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:27,584 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 07:13:27,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:27,801 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 6 times [2021-05-06 07:13:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:27,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465685091] [2021-05-06 07:13:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:27,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:27,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197275026] [2021-05-06 07:13:27,809 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 07:13:27,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 07:13:27,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 07:13:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:28,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:28,107 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 07:13:28,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465685091] [2021-05-06 07:13:28,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197275026] [2021-05-06 07:13:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197275026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:28,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:28,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:13:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67116461] [2021-05-06 07:13:28,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:13:28,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:13:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:13:28,109 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 07:13:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:28,553 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-05-06 07:13:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:13:28,554 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 07:13:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:28,555 INFO L225 Difference]: With dead ends: 110 [2021-05-06 07:13:28,555 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 07:13:28,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:13:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 07:13:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-06 07:13:28,559 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 07:13:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 07:13:28,560 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2021-05-06 07:13:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:28,561 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 07:13:28,561 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 07:13:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 07:13:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:13:28,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:28,562 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 07:13:28,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 07:13:28,765 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1552787842, now seen corresponding path program 7 times [2021-05-06 07:13:28,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:28,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970102364] [2021-05-06 07:13:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:28,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:28,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035267904] [2021-05-06 07:13:28,772 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 07:13:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:13:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:13:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:29,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,023 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 07:13:29,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:29,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970102364] [2021-05-06 07:13:29,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:29,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035267904] [2021-05-06 07:13:29,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035267904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:29,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:29,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:13:29,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735061706] [2021-05-06 07:13:29,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:13:29,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:29,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:13:29,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:13:29,025 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 07:13:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:29,256 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-05-06 07:13:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:13:29,256 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 07:13:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:29,257 INFO L225 Difference]: With dead ends: 114 [2021-05-06 07:13:29,257 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 07:13:29,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:13:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 07:13:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 07:13:29,261 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 07:13:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-06 07:13:29,261 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-06 07:13:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:29,262 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-06 07:13:29,262 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 07:13:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-06 07:13:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 07:13:29,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:29,263 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 07:13:29,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 07:13:29,478 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2021-05-06 07:13:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:29,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605016272] [2021-05-06 07:13:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:29,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:29,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344314425] [2021-05-06 07:13:29,484 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 07:13:29,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:13:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 07:13:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:29,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:29,875 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 07:13:29,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:29,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605016272] [2021-05-06 07:13:29,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:29,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344314425] [2021-05-06 07:13:29,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344314425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:29,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:29,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:13:29,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162072929] [2021-05-06 07:13:29,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:13:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:13:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:13:29,876 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 07:13:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:30,015 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2021-05-06 07:13:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:13:30,016 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 07:13:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:30,018 INFO L225 Difference]: With dead ends: 115 [2021-05-06 07:13:30,018 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 07:13:30,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:13:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 07:13:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-06 07:13:30,024 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 07:13:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-06 07:13:30,025 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-06 07:13:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:30,025 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-06 07:13:30,026 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 07:13:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-06 07:13:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 07:13:30,026 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:30,027 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 07:13:30,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:30,250 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1591187207, now seen corresponding path program 8 times [2021-05-06 07:13:30,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:30,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541485324] [2021-05-06 07:13:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:30,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:30,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161682867] [2021-05-06 07:13:30,257 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 07:13:30,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:13:30,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:30,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:13:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:30,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:30,511 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 07:13:30,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541485324] [2021-05-06 07:13:30,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161682867] [2021-05-06 07:13:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161682867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:30,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:30,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:13:30,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046928047] [2021-05-06 07:13:30,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:13:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:13:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:13:30,513 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 07:13:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:30,680 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2021-05-06 07:13:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:13:30,682 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 07:13:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:30,683 INFO L225 Difference]: With dead ends: 140 [2021-05-06 07:13:30,683 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 07:13:30,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:13:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 07:13:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2021-05-06 07:13:30,686 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 07:13:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-05-06 07:13:30,686 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 103 [2021-05-06 07:13:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:30,687 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-05-06 07:13:30,687 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 07:13:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-05-06 07:13:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 07:13:30,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:30,688 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 07:13:30,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:30,888 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2021-05-06 07:13:30,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:30,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697809629] [2021-05-06 07:13:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:30,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:30,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372709958] [2021-05-06 07:13:30,898 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 07:13:30,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:13:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:13:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:31,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:31,194 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 07:13:31,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:31,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697809629] [2021-05-06 07:13:31,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:31,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372709958] [2021-05-06 07:13:31,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372709958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:31,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:31,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:13:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843212596] [2021-05-06 07:13:31,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:13:31,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:31,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:13:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:13:31,198 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 07:13:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:31,326 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2021-05-06 07:13:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:13:31,326 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 07:13:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:31,327 INFO L225 Difference]: With dead ends: 134 [2021-05-06 07:13:31,327 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 07:13:31,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:13:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 07:13:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-06 07:13:31,332 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 07:13:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-05-06 07:13:31,334 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2021-05-06 07:13:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:31,334 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-05-06 07:13:31,334 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 07:13:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-05-06 07:13:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 07:13:31,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:31,335 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 07:13:31,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 07:13:31,557 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1186188245, now seen corresponding path program 9 times [2021-05-06 07:13:31,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:31,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415331198] [2021-05-06 07:13:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:31,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:31,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491892022] [2021-05-06 07:13:31,562 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 07:13:31,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:13:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 07:13:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:32,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:32,193 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 07:13:32,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415331198] [2021-05-06 07:13:32,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491892022] [2021-05-06 07:13:32,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491892022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:32,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:32,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:13:32,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21390744] [2021-05-06 07:13:32,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:13:32,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:13:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:13:32,195 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 07:13:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:32,809 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-05-06 07:13:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:13:32,810 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 07:13:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:32,810 INFO L225 Difference]: With dead ends: 127 [2021-05-06 07:13:32,810 INFO L226 Difference]: Without dead ends: 124 [2021-05-06 07:13:32,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:13:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-06 07:13:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-06 07:13:32,814 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 07:13:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2021-05-06 07:13:32,814 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 108 [2021-05-06 07:13:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:32,815 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2021-05-06 07:13:32,815 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 07:13:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2021-05-06 07:13:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 07:13:32,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:32,816 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 07:13:33,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:33,029 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2021-05-06 07:13:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527862815] [2021-05-06 07:13:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:33,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:33,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873117976] [2021-05-06 07:13:33,034 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 07:13:33,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 07:13:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 07:13:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:33,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:33,636 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 07:13:33,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:33,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527862815] [2021-05-06 07:13:33,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:33,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873117976] [2021-05-06 07:13:33,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873117976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:33,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:33,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 07:13:33,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720779224] [2021-05-06 07:13:33,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 07:13:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:33,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 07:13:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:13:33,639 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:13:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:33,792 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-05-06 07:13:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:13:33,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2021-05-06 07:13:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:33,794 INFO L225 Difference]: With dead ends: 128 [2021-05-06 07:13:33,794 INFO L226 Difference]: Without dead ends: 126 [2021-05-06 07:13:33,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:13:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-06 07:13:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-05-06 07:13:33,797 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 07:13:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2021-05-06 07:13:33,798 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 129 [2021-05-06 07:13:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:33,798 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2021-05-06 07:13:33,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:13:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2021-05-06 07:13:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 07:13:33,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:33,800 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 07:13:34,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 07:13:34,025 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:34,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2021-05-06 07:13:34,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:34,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148655] [2021-05-06 07:13:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:34,032 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:34,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807995190] [2021-05-06 07:13:34,033 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 07:13:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:13:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 07:13:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:34,547 WARN L159 QuantifierPusher]: Ignoring assumption.