/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/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:16:57,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:16:57,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:16:57,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:16:57,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:16:57,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:16:57,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:16:57,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:16:57,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:16:57,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:16:57,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:16:57,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:16:57,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:16:57,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:16:57,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:16:57,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:16:57,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:16:57,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:16:57,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:16:57,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:16:57,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:16:57,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:16:57,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:16:57,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:16:57,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:16:57,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:16:57,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:16:57,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:16:57,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:16:57,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:16:57,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:16:57,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:16:57,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:16:57,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:16:57,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:16:57,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:16:57,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:16:57,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:16:57,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:16:57,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:16:57,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:16:57,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:16:57,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:16:57,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:16:57,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:16:57,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:16:57,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:16:57,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:16:57,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:16:57,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:16:57,956 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:16:57,956 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:16:58,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:16:58,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:16:58,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:16:58,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:16:58,236 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:16:58,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-06 08:16:58,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4947af43/5c6b9dc32fc746b3abc4cab5c43d7559/FLAG8fcdb032e [2021-05-06 08:16:58,590 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:16:58,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-06 08:16:58,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4947af43/5c6b9dc32fc746b3abc4cab5c43d7559/FLAG8fcdb032e [2021-05-06 08:16:59,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4947af43/5c6b9dc32fc746b3abc4cab5c43d7559 [2021-05-06 08:16:59,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:16:59,023 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:16:59,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:16:59,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:16:59,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:16:59,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e146d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59, skipping insertion in model container [2021-05-06 08:16:59,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:16:59,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:16:59,155 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/egcd2-ll_valuebound10.c[490,503] [2021-05-06 08:16:59,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:16:59,185 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:16:59,206 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/egcd2-ll_valuebound10.c[490,503] [2021-05-06 08:16:59,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:16:59,244 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:16:59,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59 WrapperNode [2021-05-06 08:16:59,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:16:59,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:16:59,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:16:59,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:16:59,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:16:59,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:16:59,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:16:59,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:16:59,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:16:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:16:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:16:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:16:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:16:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:16:59,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:16:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:16:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:16:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:16:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:16:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:16:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:16:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:16:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:16:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:16:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:16:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:16:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:16:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:16:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:16:59,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:16:59,623 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:16:59,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:16:59 BoogieIcfgContainer [2021-05-06 08:16:59,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:16:59,624 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:16:59,624 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:16:59,625 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:16:59,626 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:16:59" (1/1) ... [2021-05-06 08:16:59,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:16:59 BasicIcfg [2021-05-06 08:16:59,644 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:16:59,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:16:59,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:16:59,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:16:59,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:16:59" (1/4) ... [2021-05-06 08:16:59,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f00e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:16:59, skipping insertion in model container [2021-05-06 08:16:59,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:59" (2/4) ... [2021-05-06 08:16:59,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f00e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:16:59, skipping insertion in model container [2021-05-06 08:16:59,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:16:59" (3/4) ... [2021-05-06 08:16:59,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f00e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:16:59, skipping insertion in model container [2021-05-06 08:16:59,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:16:59" (4/4) ... [2021-05-06 08:16:59,651 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.cJordan [2021-05-06 08:16:59,655 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:16:59,658 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:16:59,668 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:16:59,688 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:16:59,688 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:16:59,688 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:16:59,688 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:16:59,688 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:16:59,688 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:16:59,688 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:16:59,688 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:16:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 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 08:16:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:16:59,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:59,707 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:59,707 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:16:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:59,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70601474] [2021-05-06 08:16:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:16:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:16:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:16:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:16:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:16:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:16:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:16:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:16:59,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70601474] [2021-05-06 08:16:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70601474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:16:59,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:16:59,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:16:59,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678511351] [2021-05-06 08:16:59,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:16:59,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:59,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:16:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:16:59,945 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:17:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:00,090 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:17:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:17:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 08:17:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:00,096 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:17:00,096 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:17:00,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:17:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:17:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:17:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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 08:17:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:17:00,119 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:17:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:00,119 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:17:00,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:17:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:17:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:17:00,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:00,120 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:00,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:17:00,121 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:17:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:00,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664857199] [2021-05-06 08:17:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:00,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:00,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025517309] [2021-05-06 08:17:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:17:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:00,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:17:00,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664857199] [2021-05-06 08:17:00,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025517309] [2021-05-06 08:17:00,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025517309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:00,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:00,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:17:00,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728420178] [2021-05-06 08:17:00,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:17:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:17:00,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:17:00,401 INFO L87 Difference]: Start difference. First operand 35 states and 46 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:17:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:00,524 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:17:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:00,525 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 08:17:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:00,526 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:17:00,526 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:17:00,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:17:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:17:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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 08:17:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:17:00,532 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:17:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:00,532 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:17:00,532 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:17:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:17:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:17:00,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:00,533 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:00,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:17:00,753 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:17:00,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:00,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926228470] [2021-05-06 08:17:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:00,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:00,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947710865] [2021-05-06 08:17:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:17:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:00,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:17:01,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926228470] [2021-05-06 08:17:01,039 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:01,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947710865] [2021-05-06 08:17:01,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947710865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:01,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:01,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:01,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627636550] [2021-05-06 08:17:01,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:01,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:01,044 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:17:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:01,167 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:17:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 08:17:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:01,168 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:17:01,169 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:17:01,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:17:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:17:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:17:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:17:01,175 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:17:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:01,175 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:17:01,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:17:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:17:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:17:01,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:01,176 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:01,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:01,381 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:17:01,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:01,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544789392] [2021-05-06 08:17:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:01,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:01,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765246438] [2021-05-06 08:17:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:01,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:17:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:01,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:17:01,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:01,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544789392] [2021-05-06 08:17:01,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:01,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765246438] [2021-05-06 08:17:01,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765246438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:01,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:01,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:01,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764351507] [2021-05-06 08:17:01,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:01,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:01,591 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:17:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:01,699 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:17:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:17:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 08:17:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:01,702 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:17:01,702 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:17:01,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:17:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:17:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:17:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:17:01,707 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:17:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:01,707 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:17:01,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:17:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:17:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:17:01,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:01,708 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:01,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:01,913 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:17:01,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:01,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309468809] [2021-05-06 08:17:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:01,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:01,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342570395] [2021-05-06 08:17:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:17:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:01,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:17:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309468809] [2021-05-06 08:17:02,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342570395] [2021-05-06 08:17:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342570395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:02,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:02,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:02,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459783486] [2021-05-06 08:17:02,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:02,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:02,118 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:17:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:02,227 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:17:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 08:17:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:02,228 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:17:02,228 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:17:02,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:17:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:17:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:17:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:17:02,233 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:17:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:02,233 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:17:02,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:17:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:17:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:17:02,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:02,234 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:02,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:02,441 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:17:02,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:02,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060712856] [2021-05-06 08:17:02,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:02,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:02,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594883146] [2021-05-06 08:17:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:02,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:02,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:17:02,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060712856] [2021-05-06 08:17:02,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594883146] [2021-05-06 08:17:02,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594883146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:02,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:02,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:02,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750234323] [2021-05-06 08:17:02,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:02,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:02,669 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:17:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:02,760 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 08:17:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:17:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 08:17:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:02,762 INFO L225 Difference]: With dead ends: 62 [2021-05-06 08:17:02,762 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 08:17:02,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 08:17:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 08:17:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:17:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:17:02,766 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:17:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:02,766 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:17:02,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:17:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:17:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:17:02,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:02,767 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:02,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:17:02,976 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:17:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:02,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4861330] [2021-05-06 08:17:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:02,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:02,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95053094] [2021-05-06 08:17:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:17:03,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:03,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:17:03,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4861330] [2021-05-06 08:17:03,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:03,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95053094] [2021-05-06 08:17:03,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95053094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:03,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:03,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:17:03,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296873382] [2021-05-06 08:17:03,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:17:03,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:17:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:03,225 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:17:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:03,418 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-05-06 08:17:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:17:03,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 08:17:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:03,420 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:17:03,420 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 08:17:03,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 08:17:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 08:17:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:17:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 08:17:03,425 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 08:17:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:03,425 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 08:17:03,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:17:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 08:17:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:17:03,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:03,426 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:03,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:03,641 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:17:03,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:03,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549100361] [2021-05-06 08:17:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:03,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:03,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502300395] [2021-05-06 08:17:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:03,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:17:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:03,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:17:03,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:03,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549100361] [2021-05-06 08:17:03,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:03,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502300395] [2021-05-06 08:17:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502300395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:03,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:03,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:03,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943457520] [2021-05-06 08:17:03,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:03,821 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:17:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:03,938 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2021-05-06 08:17:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 08:17:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:03,942 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:17:03,942 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:17:03,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:17:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 08:17:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:17:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 08:17:03,959 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 08:17:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:03,960 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 08:17:03,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:17:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 08:17:03,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:17:03,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:03,961 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:04,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:04,169 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2044653414, now seen corresponding path program 1 times [2021-05-06 08:17:04,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:04,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256470889] [2021-05-06 08:17:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:04,179 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:04,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618582448] [2021-05-06 08:17:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:04,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:17:04,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:04,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256470889] [2021-05-06 08:17:04,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:04,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618582448] [2021-05-06 08:17:04,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618582448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:04,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:04,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:17:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858501822] [2021-05-06 08:17:04,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:17:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:17:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:04,388 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:17:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:04,562 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-05-06 08:17:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 08:17:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:04,563 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:17:04,563 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:17:04,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:17:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 08:17:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:17:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 08:17:04,581 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 08:17:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:04,582 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 08:17:04,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:17:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 08:17:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:17:04,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:04,585 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:04,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:17:04,801 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 2 times [2021-05-06 08:17:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:04,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134631827] [2021-05-06 08:17:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:04,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:04,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982301417] [2021-05-06 08:17:04,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:04,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:04,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:04,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:04,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:17:04,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134631827] [2021-05-06 08:17:04,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982301417] [2021-05-06 08:17:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982301417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:04,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:04,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:04,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766673952] [2021-05-06 08:17:04,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:04,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:04,980 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:17:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:05,060 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2021-05-06 08:17:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:17:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 08:17:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:05,061 INFO L225 Difference]: With dead ends: 107 [2021-05-06 08:17:05,062 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:17:05,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:17:05,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 08:17:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:17:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 08:17:05,066 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 08:17:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:05,066 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 08:17:05,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:17:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 08:17:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:17:05,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:05,067 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:05,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:05,289 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 3 times [2021-05-06 08:17:05,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:05,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315816101] [2021-05-06 08:17:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:05,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:05,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807624601] [2021-05-06 08:17:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:05,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:05,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:05,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:17:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:05,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 08:17:05,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:05,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315816101] [2021-05-06 08:17:05,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:05,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807624601] [2021-05-06 08:17:05,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807624601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:05,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:05,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681518669] [2021-05-06 08:17:05,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:05,631 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 08:17:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:05,871 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2021-05-06 08:17:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:05,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 80 [2021-05-06 08:17:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:05,873 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:17:05,873 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:17:05,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:17:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:17:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 08:17:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:17:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 08:17:05,879 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 08:17:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:05,879 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 08:17:05,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 08:17:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 08:17:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:17:05,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:05,880 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:06,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:06,093 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 4 times [2021-05-06 08:17:06,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:06,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527868329] [2021-05-06 08:17:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:06,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:06,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915504793] [2021-05-06 08:17:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:06,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 08:17:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:06,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-06 08:17:06,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:06,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527868329] [2021-05-06 08:17:06,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:06,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915504793] [2021-05-06 08:17:06,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915504793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:06,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:06,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:06,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948399565] [2021-05-06 08:17:06,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:06,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:06,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:06,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:06,433 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:17:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:06,645 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2021-05-06 08:17:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:17:06,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-06 08:17:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:06,647 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:17:06,647 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:17:06,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:17:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 08:17:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:17:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 08:17:06,652 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 08:17:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:06,652 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 08:17:06,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:17:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 08:17:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:17:06,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:06,653 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:06,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:17:06,873 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:17:06,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:06,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029161524] [2021-05-06 08:17:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:06,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:06,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188436538] [2021-05-06 08:17:06,880 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:06,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:06,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:17:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:06,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:17:07,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029161524] [2021-05-06 08:17:07,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188436538] [2021-05-06 08:17:07,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188436538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:07,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:07,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:17:07,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726986141] [2021-05-06 08:17:07,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:17:07,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:07,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:17:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:07,188 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:17:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:07,581 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2021-05-06 08:17:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 08:17:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:07,583 INFO L225 Difference]: With dead ends: 150 [2021-05-06 08:17:07,583 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 08:17:07,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:17:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 08:17:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 08:17:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 08:17:07,588 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 08:17:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:07,588 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 08:17:07,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:17:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 08:17:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:17:07,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:07,589 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:07,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:17:07,793 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:17:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:07,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154743014] [2021-05-06 08:17:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:07,799 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:07,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392354532] [2021-05-06 08:17:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:07,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:17:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:08,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 08:17:08,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154743014] [2021-05-06 08:17:08,056 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392354532] [2021-05-06 08:17:08,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392354532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:08,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:08,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90611789] [2021-05-06 08:17:08,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:08,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:08,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:08,057 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:17:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:08,382 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2021-05-06 08:17:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 08:17:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:08,384 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:17:08,384 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:17:08,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:17:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 08:17:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:17:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 08:17:08,393 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 08:17:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:08,393 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 08:17:08,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:17:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 08:17:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:17:08,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:08,394 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:08,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:17:08,601 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash -761940128, now seen corresponding path program 1 times [2021-05-06 08:17:08,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:08,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770919372] [2021-05-06 08:17:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:08,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777869145] [2021-05-06 08:17:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:17:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 08:17:08,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770919372] [2021-05-06 08:17:08,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777869145] [2021-05-06 08:17:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777869145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:08,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:08,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:17:08,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617275974] [2021-05-06 08:17:08,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:17:08,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:17:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:17:08,777 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:17:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:08,829 INFO L93 Difference]: Finished difference Result 195 states and 269 transitions. [2021-05-06 08:17:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 08:17:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:08,832 INFO L225 Difference]: With dead ends: 195 [2021-05-06 08:17:08,832 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 08:17:08,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 08:17:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 08:17:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:17:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 08:17:08,839 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 08:17:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:08,839 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 08:17:08,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:17:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 08:17:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:17:08,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:08,841 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:09,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:09,056 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 5 times [2021-05-06 08:17:09,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:09,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542537958] [2021-05-06 08:17:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:09,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:09,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250208163] [2021-05-06 08:17:09,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:09,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 08:17:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:17:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:09,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 08:17:09,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:09,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542537958] [2021-05-06 08:17:09,230 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:09,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250208163] [2021-05-06 08:17:09,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250208163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:17:09,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:17:09,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:17:09,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040381500] [2021-05-06 08:17:09,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:17:09,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:17:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:17:09,232 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:17:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:09,285 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2021-05-06 08:17:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 08:17:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:09,286 INFO L225 Difference]: With dead ends: 160 [2021-05-06 08:17:09,286 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 08:17:09,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 08:17:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 08:17:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 08:17:09,291 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 08:17:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:09,291 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 08:17:09,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:17:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 08:17:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:17:09,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:09,292 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:09,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:17:09,509 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 2 times [2021-05-06 08:17:09,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:09,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500779192] [2021-05-06 08:17:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:09,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:09,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268753198] [2021-05-06 08:17:09,525 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:09,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:17:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:09,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 08:17:09,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500779192] [2021-05-06 08:17:09,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268753198] [2021-05-06 08:17:09,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268753198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:09,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:09,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:09,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470377659] [2021-05-06 08:17:09,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:09,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:09,928 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:17:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:10,258 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2021-05-06 08:17:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:17:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 107 [2021-05-06 08:17:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:10,259 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:17:10,259 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:17:10,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:17:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-06 08:17:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 92 states have internal predecessors, (95), 49 states have call successors, (49), 18 states have call predecessors, (49), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-05-06 08:17:10,264 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 107 [2021-05-06 08:17:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:10,264 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-05-06 08:17:10,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:17:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-05-06 08:17:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:17:10,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:10,266 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:10,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:17:10,469 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-06 08:17:10,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:10,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953280628] [2021-05-06 08:17:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:10,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:10,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692770484] [2021-05-06 08:17:10,475 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 08:17:10,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:17:10,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:17:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:10,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 08:17:10,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:10,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953280628] [2021-05-06 08:17:10,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692770484] [2021-05-06 08:17:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692770484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:10,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:10,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516227448] [2021-05-06 08:17:10,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:10,668 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:17:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:10,723 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-05-06 08:17:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:17:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 08:17:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:10,725 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:17:10,725 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 08:17:10,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 08:17:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-06 08:17:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 08:17:10,729 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 111 [2021-05-06 08:17:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:10,729 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 08:17:10,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:17:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 08:17:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:17:10,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:10,731 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:10,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:10,945 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-06 08:17:10,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:10,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091525594] [2021-05-06 08:17:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:10,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:10,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988771497] [2021-05-06 08:17:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:17:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:11,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 08:17:11,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091525594] [2021-05-06 08:17:11,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:11,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988771497] [2021-05-06 08:17:11,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988771497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:11,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:11,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:17:11,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344882549] [2021-05-06 08:17:11,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:17:11,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:17:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:11,310 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:11,738 INFO L93 Difference]: Finished difference Result 190 states and 239 transitions. [2021-05-06 08:17:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 113 [2021-05-06 08:17:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:11,740 INFO L225 Difference]: With dead ends: 190 [2021-05-06 08:17:11,740 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 08:17:11,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 08:17:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-06 08:17:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:17:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2021-05-06 08:17:11,745 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 113 [2021-05-06 08:17:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:11,745 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2021-05-06 08:17:11,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2021-05-06 08:17:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:17:11,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:11,746 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:11,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:11,961 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-06 08:17:11,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:11,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397447567] [2021-05-06 08:17:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:11,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:11,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002901938] [2021-05-06 08:17:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:12,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:12,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:12,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:17:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:12,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 08:17:12,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:12,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397447567] [2021-05-06 08:17:12,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:12,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002901938] [2021-05-06 08:17:12,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002901938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:12,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:12,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:12,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757616109] [2021-05-06 08:17:12,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:12,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:12,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:12,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:12,177 INFO L87 Difference]: Start difference. First operand 187 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:17:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:12,352 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2021-05-06 08:17:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 08:17:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:12,354 INFO L225 Difference]: With dead ends: 226 [2021-05-06 08:17:12,354 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 08:17:12,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 08:17:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-05-06 08:17:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 112 states have (on average 1.125) internal successors, (126), 113 states have internal predecessors, (126), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:17:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2021-05-06 08:17:12,361 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 116 [2021-05-06 08:17:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:12,361 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2021-05-06 08:17:12,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:17:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2021-05-06 08:17:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:17:12,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:12,362 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:12,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:12,563 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-06 08:17:12,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:12,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093966170] [2021-05-06 08:17:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:12,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:12,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076119772] [2021-05-06 08:17:12,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:12,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 08:17:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:12,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:12,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 08:17:13,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:13,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093966170] [2021-05-06 08:17:13,007 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:13,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076119772] [2021-05-06 08:17:13,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076119772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:13,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:13,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:17:13,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533360941] [2021-05-06 08:17:13,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:17:13,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:17:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:13,008 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:17:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:13,427 INFO L93 Difference]: Finished difference Result 243 states and 318 transitions. [2021-05-06 08:17:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:17:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 08:17:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:13,429 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:17:13,429 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:17:13,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:17:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:17:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-05-06 08:17:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:17:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2021-05-06 08:17:13,436 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 127 [2021-05-06 08:17:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:13,436 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2021-05-06 08:17:13,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:17:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2021-05-06 08:17:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:17:13,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:13,437 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:13,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:17:13,656 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-06 08:17:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:13,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298521729] [2021-05-06 08:17:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:13,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:13,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296348340] [2021-05-06 08:17:13,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:13,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 08:17:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:13,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 110 proven. 102 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-06 08:17:14,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:14,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298521729] [2021-05-06 08:17:14,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:14,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296348340] [2021-05-06 08:17:14,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296348340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:14,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:14,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:17:14,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695368659] [2021-05-06 08:17:14,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:17:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:17:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:14,293 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-06 08:17:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:15,173 INFO L93 Difference]: Finished difference Result 250 states and 323 transitions. [2021-05-06 08:17:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:17:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 129 [2021-05-06 08:17:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:15,174 INFO L225 Difference]: With dead ends: 250 [2021-05-06 08:17:15,175 INFO L226 Difference]: Without dead ends: 250 [2021-05-06 08:17:15,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:17:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-06 08:17:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-05-06 08:17:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 137 states have internal predecessors, (152), 85 states have call successors, (85), 26 states have call predecessors, (85), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:17:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2021-05-06 08:17:15,181 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 129 [2021-05-06 08:17:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:15,181 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2021-05-06 08:17:15,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-06 08:17:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2021-05-06 08:17:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:17:15,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:15,182 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:15,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:17:15,397 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-06 08:17:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:15,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149933199] [2021-05-06 08:17:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:15,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:15,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390079510] [2021-05-06 08:17:15,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:15,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:17:15,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-06 08:17:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 92 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:17:15,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:15,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149933199] [2021-05-06 08:17:15,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:15,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390079510] [2021-05-06 08:17:15,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390079510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:15,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:15,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:17:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246949324] [2021-05-06 08:17:15,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:17:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:17:15,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:15,941 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:17:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:16,507 INFO L93 Difference]: Finished difference Result 259 states and 330 transitions. [2021-05-06 08:17:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:16,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 08:17:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:16,509 INFO L225 Difference]: With dead ends: 259 [2021-05-06 08:17:16,509 INFO L226 Difference]: Without dead ends: 259 [2021-05-06 08:17:16,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-06 08:17:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2021-05-06 08:17:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 143 states have internal predecessors, (158), 85 states have call successors, (85), 28 states have call predecessors, (85), 27 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:17:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2021-05-06 08:17:16,515 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 132 [2021-05-06 08:17:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:16,515 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2021-05-06 08:17:16,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:17:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2021-05-06 08:17:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 08:17:16,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:16,516 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:16,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:16,732 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-06 08:17:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:16,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307992176] [2021-05-06 08:17:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:16,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:16,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302141051] [2021-05-06 08:17:16,739 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:16,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:16,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:17:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:16,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:17,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,064 WARN L205 SmtUtils]: Spent 59.81 s on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-06 08:18:17,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 92 proven. 95 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2021-05-06 08:18:17,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:17,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307992176] [2021-05-06 08:18:17,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:17,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302141051] [2021-05-06 08:18:17,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302141051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:17,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:17,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:18:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544794348] [2021-05-06 08:18:17,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:18:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:18:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:18:17,253 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 08:19:21,261 WARN L205 SmtUtils]: Spent 1.06 m on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-06 08:19:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:45,297 INFO L93 Difference]: Finished difference Result 298 states and 386 transitions. [2021-05-06 08:19:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:19:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) Word has length 135 [2021-05-06 08:19:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:45,299 INFO L225 Difference]: With dead ends: 298 [2021-05-06 08:19:45,299 INFO L226 Difference]: Without dead ends: 297 [2021-05-06 08:19:45,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 123795.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:19:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-06 08:19:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2021-05-06 08:19:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 162 states have (on average 1.117283950617284) internal successors, (181), 163 states have internal predecessors, (181), 101 states have call successors, (101), 31 states have call predecessors, (101), 30 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:19:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 381 transitions. [2021-05-06 08:19:45,305 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 381 transitions. Word has length 135 [2021-05-06 08:19:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:45,306 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 381 transitions. [2021-05-06 08:19:45,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 08:19:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 381 transitions. [2021-05-06 08:19:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 08:19:45,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:45,307 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:45,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:19:45,529 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:45,529 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-06 08:19:45,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:45,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103944135] [2021-05-06 08:19:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:45,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:45,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584584939] [2021-05-06 08:19:45,543 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:45,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:19:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-06 08:19:45,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:45,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 100 proven. 119 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 08:19:46,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:46,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103944135] [2021-05-06 08:19:46,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:46,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584584939] [2021-05-06 08:19:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584584939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:19:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201670263] [2021-05-06 08:19:46,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:19:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:19:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:19:46,341 INFO L87 Difference]: Start difference. First operand 294 states and 381 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:19:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:47,610 INFO L93 Difference]: Finished difference Result 342 states and 445 transitions. [2021-05-06 08:19:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:19:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-06 08:19:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:47,612 INFO L225 Difference]: With dead ends: 342 [2021-05-06 08:19:47,612 INFO L226 Difference]: Without dead ends: 337 [2021-05-06 08:19:47,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:19:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-06 08:19:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 275. [2021-05-06 08:19:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 152 states have (on average 1.118421052631579) internal successors, (170), 153 states have internal predecessors, (170), 93 states have call successors, (93), 30 states have call predecessors, (93), 29 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:19:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 354 transitions. [2021-05-06 08:19:47,619 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 354 transitions. Word has length 138 [2021-05-06 08:19:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:47,619 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 354 transitions. [2021-05-06 08:19:47,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:19:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 354 transitions. [2021-05-06 08:19:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:19:47,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:47,620 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:47,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:47,833 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 336218627, now seen corresponding path program 6 times [2021-05-06 08:19:47,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:47,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851265956] [2021-05-06 08:19:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:47,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:47,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274800704] [2021-05-06 08:19:47,838 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:48,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:19:48,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:19:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:48,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,690 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-06 08:19:49,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 86 proven. 60 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-05-06 08:19:49,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:49,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851265956] [2021-05-06 08:19:49,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:49,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274800704] [2021-05-06 08:19:49,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274800704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:49,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:49,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:19:49,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441456091] [2021-05-06 08:19:49,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:19:49,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:19:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:19:49,897 INFO L87 Difference]: Start difference. First operand 275 states and 354 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:19:51,423 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-06 08:21:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:45,345 INFO L93 Difference]: Finished difference Result 313 states and 403 transitions. [2021-05-06 08:21:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:21:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 149 [2021-05-06 08:21:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:45,347 INFO L225 Difference]: With dead ends: 313 [2021-05-06 08:21:45,347 INFO L226 Difference]: Without dead ends: 313 [2021-05-06 08:21:45,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-06 08:21:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2021-05-06 08:21:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 170 states have (on average 1.1176470588235294) internal successors, (190), 171 states have internal predecessors, (190), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 08:21:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 398 transitions. [2021-05-06 08:21:45,353 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 398 transitions. Word has length 149 [2021-05-06 08:21:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:45,353 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 398 transitions. [2021-05-06 08:21:45,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:21:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 398 transitions. [2021-05-06 08:21:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:21:45,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,355 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:45,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:21:45,561 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 7 times [2021-05-06 08:21:45,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:45,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245546449] [2021-05-06 08:21:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:45,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:45,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847804414] [2021-05-06 08:21:45,566 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 08:21:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:45,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,596 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-06 08:21:46,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 100 proven. 190 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-05-06 08:21:46,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245546449] [2021-05-06 08:21:46,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847804414] [2021-05-06 08:21:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847804414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:46,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:46,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:46,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507681759] [2021-05-06 08:21:46,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:46,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:46,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:46,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:46,650 INFO L87 Difference]: Start difference. First operand 308 states and 398 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:21:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:48,318 INFO L93 Difference]: Finished difference Result 346 states and 447 transitions. [2021-05-06 08:21:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:21:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 149 [2021-05-06 08:21:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:48,320 INFO L225 Difference]: With dead ends: 346 [2021-05-06 08:21:48,320 INFO L226 Difference]: Without dead ends: 346 [2021-05-06 08:21:48,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 953.7ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-06 08:21:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2021-05-06 08:21:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 188 states have (on average 1.1170212765957446) internal successors, (210), 189 states have internal predecessors, (210), 117 states have call successors, (117), 36 states have call predecessors, (117), 35 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:21:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 442 transitions. [2021-05-06 08:21:48,326 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 442 transitions. Word has length 149 [2021-05-06 08:21:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:48,327 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 442 transitions. [2021-05-06 08:21:48,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:21:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 442 transitions. [2021-05-06 08:21:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:21:48,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:48,328 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:48,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:48,546 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 8 times [2021-05-06 08:21:48,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:48,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558316967] [2021-05-06 08:21:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:48,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:48,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661307341] [2021-05-06 08:21:48,552 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:48,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:48,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:48,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:21:48,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:48,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,317 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-06 08:21:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 134 proven. 106 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-05-06 08:21:49,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558316967] [2021-05-06 08:21:49,390 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661307341] [2021-05-06 08:21:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661307341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:49,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:49,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697563840] [2021-05-06 08:21:49,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:49,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:49,391 INFO L87 Difference]: Start difference. First operand 341 states and 442 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-05-06 08:21:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:51,232 INFO L93 Difference]: Finished difference Result 349 states and 449 transitions. [2021-05-06 08:21:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:21:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 151 [2021-05-06 08:21:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:51,233 INFO L225 Difference]: With dead ends: 349 [2021-05-06 08:21:51,234 INFO L226 Difference]: Without dead ends: 349 [2021-05-06 08:21:51,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-06 08:21:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2021-05-06 08:21:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 191 states have (on average 1.1151832460732984) internal successors, (213), 192 states have internal predecessors, (213), 117 states have call successors, (117), 37 states have call predecessors, (117), 36 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:21:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 445 transitions. [2021-05-06 08:21:51,240 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 445 transitions. Word has length 151 [2021-05-06 08:21:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:51,240 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 445 transitions. [2021-05-06 08:21:51,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-05-06 08:21:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 445 transitions. [2021-05-06 08:21:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:21:51,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:51,241 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:51,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:21:51,454 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 9 times [2021-05-06 08:21:51,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:51,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154093207] [2021-05-06 08:21:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:51,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:51,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982236018] [2021-05-06 08:21:51,459 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:51,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:21:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 08:21:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:51,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 53 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-05-06 08:21:52,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:52,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154093207] [2021-05-06 08:21:52,180 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:52,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982236018] [2021-05-06 08:21:52,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982236018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:52,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916553998] [2021-05-06 08:21:52,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:52,181 INFO L87 Difference]: Start difference. First operand 345 states and 445 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 08:21:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:53,002 INFO L93 Difference]: Finished difference Result 411 states and 535 transitions. [2021-05-06 08:21:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-06 08:21:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:53,004 INFO L225 Difference]: With dead ends: 411 [2021-05-06 08:21:53,004 INFO L226 Difference]: Without dead ends: 411 [2021-05-06 08:21:53,004 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-06 08:21:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 378. [2021-05-06 08:21:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 209 states have (on average 1.1196172248803828) internal successors, (234), 210 states have internal predecessors, (234), 129 states have call successors, (129), 40 states have call predecessors, (129), 39 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 08:21:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 490 transitions. [2021-05-06 08:21:53,011 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 490 transitions. Word has length 154 [2021-05-06 08:21:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:53,011 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 490 transitions. [2021-05-06 08:21:53,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 08:21:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 490 transitions. [2021-05-06 08:21:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:21:53,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:53,012 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:53,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:21:53,229 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 10 times [2021-05-06 08:21:53,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:53,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565330218] [2021-05-06 08:21:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:53,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:53,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453309867] [2021-05-06 08:21:53,234 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:53,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:53,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:53,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:21:53,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 107 proven. 138 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-05-06 08:21:53,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:53,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565330218] [2021-05-06 08:21:53,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:53,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453309867] [2021-05-06 08:21:53,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453309867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:53,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:53,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:53,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498458789] [2021-05-06 08:21:53,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:53,857 INFO L87 Difference]: Start difference. First operand 378 states and 490 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) [2021-05-06 08:21:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:54,965 INFO L93 Difference]: Finished difference Result 391 states and 501 transitions. [2021-05-06 08:21:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) Word has length 154 [2021-05-06 08:21:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:54,967 INFO L225 Difference]: With dead ends: 391 [2021-05-06 08:21:54,967 INFO L226 Difference]: Without dead ends: 391 [2021-05-06 08:21:54,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-06 08:21:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 386. [2021-05-06 08:21:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 215 states have (on average 1.1162790697674418) internal successors, (240), 216 states have internal predecessors, (240), 129 states have call successors, (129), 42 states have call predecessors, (129), 41 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 08:21:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 496 transitions. [2021-05-06 08:21:54,974 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 496 transitions. Word has length 154 [2021-05-06 08:21:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:54,974 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 496 transitions. [2021-05-06 08:21:54,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) [2021-05-06 08:21:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 496 transitions. [2021-05-06 08:21:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:21:54,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:54,975 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:55,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-06 08:21:55,187 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 6 times [2021-05-06 08:21:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:55,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208351839] [2021-05-06 08:21:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:55,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:55,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638659084] [2021-05-06 08:21:55,192 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:55,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:21:55,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:21:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:55,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:55,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:55,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 97 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-05-06 08:21:55,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:55,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208351839] [2021-05-06 08:21:55,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:55,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638659084] [2021-05-06 08:21:55,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638659084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:55,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:55,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:55,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903338527] [2021-05-06 08:21:55,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:55,522 INFO L87 Difference]: Start difference. First operand 386 states and 496 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-06 08:21:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:55,794 INFO L93 Difference]: Finished difference Result 451 states and 585 transitions. [2021-05-06 08:21:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:21:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 157 [2021-05-06 08:21:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:55,796 INFO L225 Difference]: With dead ends: 451 [2021-05-06 08:21:55,796 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 08:21:55,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 08:21:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 419. [2021-05-06 08:21:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 233 states have (on average 1.1158798283261802) internal successors, (260), 234 states have internal predecessors, (260), 141 states have call successors, (141), 45 states have call predecessors, (141), 44 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:21:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 540 transitions. [2021-05-06 08:21:55,804 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 540 transitions. Word has length 157 [2021-05-06 08:21:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:55,804 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 540 transitions. [2021-05-06 08:21:55,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-06 08:21:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 540 transitions. [2021-05-06 08:21:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:21:55,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:55,805 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:56,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:56,013 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:56,013 INFO L82 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 7 times [2021-05-06 08:21:56,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:56,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720100209] [2021-05-06 08:21:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:56,018 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:56,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918467276] [2021-05-06 08:21:56,018 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:21:56,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:56,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,017 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 08:21:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,533 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-06 08:21:57,811 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-06 08:21:57,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 183 proven. 131 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 08:21:57,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:57,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720100209] [2021-05-06 08:21:57,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:57,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918467276] [2021-05-06 08:21:57,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918467276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:57,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:57,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:57,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764068372] [2021-05-06 08:21:57,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:21:57,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:21:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:57,983 INFO L87 Difference]: Start difference. First operand 419 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-06 08:21:59,446 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-06 08:21:59,823 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-06 08:22:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:00,848 INFO L93 Difference]: Finished difference Result 453 states and 594 transitions. [2021-05-06 08:22:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-06 08:22:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:00,849 INFO L225 Difference]: With dead ends: 453 [2021-05-06 08:22:00,849 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:00,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2173.3ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:22:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:22:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:00,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-05-06 08:22:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:00,850 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:00,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-06 08:22:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:00,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:01,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:01,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:01 BasicIcfg [2021-05-06 08:22:01,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:01,060 INFO L168 Benchmark]: Toolchain (without parser) took 302036.49 ms. Allocated memory was 204.5 MB in the beginning and 402.7 MB in the end (delta: 198.2 MB). Free memory was 169.4 MB in the beginning and 215.4 MB in the end (delta: -46.0 MB). Peak memory consumption was 153.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory was 185.5 MB in the beginning and 185.4 MB in the end (delta: 107.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.71 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 187.2 MB in the end (delta: -18.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L168 Benchmark]: Boogie Preprocessor took 33.19 ms. Allocated memory is still 204.5 MB. Free memory was 187.2 MB in the beginning and 185.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L168 Benchmark]: RCFGBuilder took 343.08 ms. Allocated memory is still 204.5 MB. Free memory was 185.7 MB in the beginning and 167.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L168 Benchmark]: IcfgTransformer took 20.28 ms. Allocated memory is still 204.5 MB. Free memory was 167.8 MB in the beginning and 166.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L168 Benchmark]: TraceAbstraction took 301413.61 ms. Allocated memory was 204.5 MB in the beginning and 402.7 MB in the end (delta: 198.2 MB). Free memory was 165.7 MB in the beginning and 215.4 MB in the end (delta: -49.7 MB). Peak memory consumption was 149.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:01,060 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory was 185.5 MB in the beginning and 185.4 MB in the end (delta: 107.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.71 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 187.2 MB in the end (delta: -18.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.19 ms. Allocated memory is still 204.5 MB. Free memory was 187.2 MB in the beginning and 185.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 343.08 ms. Allocated memory is still 204.5 MB. Free memory was 185.7 MB in the beginning and 167.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.28 ms. Allocated memory is still 204.5 MB. Free memory was 167.8 MB in the beginning and 166.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 301413.61 ms. Allocated memory was 204.5 MB in the beginning and 402.7 MB in the end (delta: 198.2 MB). Free memory was 165.7 MB in the beginning and 215.4 MB in the end (delta: -49.7 MB). Peak memory consumption was 149.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 301369.6ms, OverallIterations: 32, TraceHistogramMax: 21, EmptinessCheckTime: 36.3ms, AutomataDifference: 218827.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1554 SDtfs, 881 SDslu, 9919 SDs, 0 SdLazy, 11162 SolverSat, 1024 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 150306.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3397 GetRequests, 2932 SyntacticMatches, 17 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 132911.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=419occurred in iteration=31, InterpolantAutomatonStates: 360, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 203.7ms AutomataMinimizationTime, 32 MinimizatonAttempts, 283 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 290.1ms SsaConstructionTime, 2150.6ms SatisfiabilityAnalysisTime, 72135.2ms InterpolantComputationTime, 3302 NumberOfCodeBlocks, 2937 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 3270 ConstructedInterpolants, 21 QuantifiedInterpolants, 20914 SizeOfPredicates, 246 NumberOfNonLiveVariables, 8270 ConjunctsInSsa, 1218 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 10598/12120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...