/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/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:20:02,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:20:02,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:20:02,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:20:02,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:20:02,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:20:02,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:20:02,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:20:02,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:20:02,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:20:02,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:20:02,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:20:02,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:20:02,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:20:02,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:20:02,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:20:02,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:20:02,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:20:02,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:20:02,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:20:02,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:20:02,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:20:02,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:20:02,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:20:02,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:20:02,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:20:02,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:20:02,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:20:02,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:20:02,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:20:02,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:20:02,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:20:02,462 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:20:02,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:20:02,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:20:02,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:20:02,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:20:02,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:20:02,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:20:02,464 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:20:02,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:20:02,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:20:02,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:20:02,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:20:02,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:20:02,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:20:02,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:20:02,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:20:02,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:20:02,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:20:02,467 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:20:02,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:20:02,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:20:02,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:20:02,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:20:02,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:20:02,797 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:20:02,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2021-05-06 09:20:02,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95918bcfb/2e2c24c26f00482982c73938d5dee723/FLAGb9522cb9c [2021-05-06 09:20:03,301 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:20:03,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2021-05-06 09:20:03,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95918bcfb/2e2c24c26f00482982c73938d5dee723/FLAGb9522cb9c [2021-05-06 09:20:03,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95918bcfb/2e2c24c26f00482982c73938d5dee723 [2021-05-06 09:20:03,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:20:03,702 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:20:03,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:20:03,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:20:03,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:20:03,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1854934f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03, skipping insertion in model container [2021-05-06 09:20:03,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:20:03,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:20:03,837 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/hard2_valuebound50.c[526,539] [2021-05-06 09:20:03,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:20:03,856 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:20:03,872 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/hard2_valuebound50.c[526,539] [2021-05-06 09:20:03,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:20:03,904 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:20:03,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03 WrapperNode [2021-05-06 09:20:03,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:20:03,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:20:03,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:20:03,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:20:03,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (1/1) ... [2021-05-06 09:20:03,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:20:03,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:20:03,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:20:03,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:20:03,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (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 09:20:04,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:20:04,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:20:04,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:20:04,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:20:04,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:20:04,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:20:04,057 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:20:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:20:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:20:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:20:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:20:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:20:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:20:04,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:20:04,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:20:04,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:20:04,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:20:04,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:20:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:20:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:20:04,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:20:04,325 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:20:04,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:20:04 BoogieIcfgContainer [2021-05-06 09:20:04,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:20:04,327 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:20:04,327 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:20:04,327 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:20:04,346 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:20:04" (1/1) ... [2021-05-06 09:20:04,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:20:04 BasicIcfg [2021-05-06 09:20:04,375 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:20:04,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:20:04,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:20:04,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:20:04,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:20:03" (1/4) ... [2021-05-06 09:20:04,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d77b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:20:04, skipping insertion in model container [2021-05-06 09:20:04,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:20:03" (2/4) ... [2021-05-06 09:20:04,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d77b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:20:04, skipping insertion in model container [2021-05-06 09:20:04,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:20:04" (3/4) ... [2021-05-06 09:20:04,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d77b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:20:04, skipping insertion in model container [2021-05-06 09:20:04,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:20:04" (4/4) ... [2021-05-06 09:20:04,381 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.cJordan [2021-05-06 09:20:04,399 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:20:04,403 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:20:04,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:20:04,468 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:20:04,468 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:20:04,468 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:20:04,468 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:20:04,468 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:20:04,468 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:20:04,469 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:20:04,469 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:20:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:20:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:20:04,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:04,494 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:04,494 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 09:20:04,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:04,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224641644] [2021-05-06 09:20:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:04,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:20:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:04,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:20:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:20:04,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224641644] [2021-05-06 09:20:04,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224641644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:20:04,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:20:04,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:20:04,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748025936] [2021-05-06 09:20:04,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:20:04,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:20:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:20:04,798 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:20:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:04,908 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 09:20:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:20:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:20:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:04,917 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:20:04,917 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 09:20:04,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:20:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 09:20:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 09:20:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:20:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 09:20:04,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 09:20:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:04,958 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 09:20:04,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:20:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 09:20:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:20:04,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:04,959 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:04,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:20:04,959 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 09:20:04,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:04,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055801382] [2021-05-06 09:20:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:20:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:20:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:20:05,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:05,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055801382] [2021-05-06 09:20:05,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055801382] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:20:05,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:20:05,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:20:05,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911537007] [2021-05-06 09:20:05,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:20:05,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:20:05,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:20:05,070 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:20:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:05,298 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:20:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:20:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:20:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:05,300 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:20:05,300 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:20:05,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:20:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:20:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 09:20:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:20:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 09:20:05,308 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 09:20:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:05,309 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 09:20:05,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:20:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 09:20:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:20:05,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:05,310 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:05,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:20:05,310 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:05,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:05,311 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 09:20:05,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:05,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131878697] [2021-05-06 09:20:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:20:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:20:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 09:20:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:20:05,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:05,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131878697] [2021-05-06 09:20:05,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131878697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:20:05,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:20:05,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:20:05,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763899567] [2021-05-06 09:20:05,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:20:05,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:05,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:20:05,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:20:05,433 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:20:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:05,713 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 09:20:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:20:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:20:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:05,717 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:20:05,717 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:20:05,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:20:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:20:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 09:20:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:20:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 09:20:05,732 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 09:20:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:05,733 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 09:20:05,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:20:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 09:20:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:20:05,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:05,734 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:05,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:20:05,735 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:05,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 09:20:05,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:05,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271333245] [2021-05-06 09:20:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:05,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:05,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149233811] [2021-05-06 09:20:05,760 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 09:20:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:20:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:20:06,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:06,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271333245] [2021-05-06 09:20:06,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:06,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149233811] [2021-05-06 09:20:06,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149233811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:20:06,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:20:06,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:20:06,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948261737] [2021-05-06 09:20:06,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:20:06,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:20:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:20:06,066 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:20:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:06,120 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-05-06 09:20:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:20:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 09:20:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:06,127 INFO L225 Difference]: With dead ends: 53 [2021-05-06 09:20:06,127 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 09:20:06,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:20:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 09:20:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 09:20:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:20:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 09:20:06,140 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 09:20:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:06,140 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 09:20:06,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:20:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 09:20:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:20:06,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:06,143 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:06,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:06,357 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 09:20:06,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:06,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448430629] [2021-05-06 09:20:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:06,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:06,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522377795] [2021-05-06 09:20:06,367 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 09:20:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:20:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:06,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:20:06,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448430629] [2021-05-06 09:20:06,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522377795] [2021-05-06 09:20:06,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522377795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:20:06,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:20:06,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:20:06,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552171035] [2021-05-06 09:20:06,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:20:06,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:06,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:20:06,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:20:06,527 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:20:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:06,576 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 09:20:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:20:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 09:20:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:06,577 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:20:06,577 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:20:06,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:20:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:20:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 09:20:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:20:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 09:20:06,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 09:20:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:06,584 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 09:20:06,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:20:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 09:20:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 09:20:06,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:06,585 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 09:20:06,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:06,799 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 09:20:06,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:06,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609495968] [2021-05-06 09:20:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:06,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:06,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57127889] [2021-05-06 09:20:06,811 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 09:20:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:20:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:07,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:20:07,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609495968] [2021-05-06 09:20:07,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57127889] [2021-05-06 09:20:07,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57127889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:07,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:07,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:20:07,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333630318] [2021-05-06 09:20:07,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:20:07,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:20:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:20:07,089 INFO L87 Difference]: Start difference. First operand 57 states and 69 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), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:20:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:07,233 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 09:20:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:20:07,234 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), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 09:20:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:07,236 INFO L225 Difference]: With dead ends: 82 [2021-05-06 09:20:07,236 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 09:20:07,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:20:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 09:20:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 09:20:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:20:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 09:20:07,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 09:20:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:07,244 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 09:20:07,244 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), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:20:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 09:20:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 09:20:07,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:07,245 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:07,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:07,461 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-06 09:20:07,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:07,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184283146] [2021-05-06 09:20:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:07,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:07,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074819768] [2021-05-06 09:20:07,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:20:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:20:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:20:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:07,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:20:07,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:07,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184283146] [2021-05-06 09:20:07,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:07,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074819768] [2021-05-06 09:20:07,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074819768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:07,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:07,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:20:07,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903173071] [2021-05-06 09:20:07,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:20:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:20:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:20:07,700 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:20:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:07,843 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-05-06 09:20:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:20:07,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 09:20:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:07,845 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:20:07,845 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 09:20:07,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:20:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 09:20:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 09:20:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:20:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 09:20:07,855 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 09:20:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:07,855 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 09:20:07,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:20:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 09:20:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 09:20:07,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:07,857 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:08,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:08,065 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-06 09:20:08,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:08,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461390334] [2021-05-06 09:20:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:08,077 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:08,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859270397] [2021-05-06 09:20:08,077 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 09:20:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:20:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:08,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:20:08,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:08,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461390334] [2021-05-06 09:20:08,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:08,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859270397] [2021-05-06 09:20:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859270397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:20:08,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905239891] [2021-05-06 09:20:08,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:20:08,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:08,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:20:08,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:20:08,386 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:20:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:08,496 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-05-06 09:20:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:20:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 09:20:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:08,498 INFO L225 Difference]: With dead ends: 125 [2021-05-06 09:20:08,498 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 09:20:08,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:20:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 09:20:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 09:20:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:20:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 09:20:08,508 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 09:20:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:08,508 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 09:20:08,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:20:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 09:20:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 09:20:08,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:08,510 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:08,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:08,741 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-06 09:20:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:08,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533183163] [2021-05-06 09:20:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:08,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:08,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908384665] [2021-05-06 09:20:08,754 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 09:20:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:08,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:20:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:09,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:20:09,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533183163] [2021-05-06 09:20:09,051 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:09,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908384665] [2021-05-06 09:20:09,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908384665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:09,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:09,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:20:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488210938] [2021-05-06 09:20:09,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:20:09,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:09,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:20:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:20:09,054 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:20:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:09,169 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:20:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:20:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 09:20:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:09,172 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:20:09,173 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 09:20:09,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:20:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 09:20:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 09:20:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 09:20:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 09:20:09,181 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 09:20:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:09,181 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 09:20:09,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:20:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 09:20:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 09:20:09,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:09,183 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:09,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:09,397 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -273867048, now seen corresponding path program 3 times [2021-05-06 09:20:09,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:09,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310550004] [2021-05-06 09:20:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:09,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:09,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665521904] [2021-05-06 09:20:09,406 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 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 09:20:09,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:20:09,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:20:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:09,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:09,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:09,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 09:20:09,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310550004] [2021-05-06 09:20:09,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665521904] [2021-05-06 09:20:09,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665521904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:09,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:09,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:20:09,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216598642] [2021-05-06 09:20:09,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:20:09,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:09,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:20:09,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:20:09,682 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:20:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:09,816 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 09:20:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:20:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 09:20:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:09,818 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:20:09,818 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 09:20:09,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:20:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 09:20:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 09:20:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:20:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 09:20:09,825 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 09:20:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:09,826 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 09:20:09,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:20:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 09:20:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 09:20:09,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:09,827 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-06 09:20:10,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 09:20:10,053 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1708305639, now seen corresponding path program 2 times [2021-05-06 09:20:10,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:10,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004205567] [2021-05-06 09:20:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:10,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:10,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751138278] [2021-05-06 09:20:10,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:10,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:20:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:20:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:10,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 09:20:10,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004205567] [2021-05-06 09:20:10,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751138278] [2021-05-06 09:20:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751138278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:10,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:10,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:20:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407117307] [2021-05-06 09:20:10,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:20:10,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:10,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:20:10,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:20:10,391 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:20:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:10,565 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-05-06 09:20:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:20:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 09:20:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:10,568 INFO L225 Difference]: With dead ends: 136 [2021-05-06 09:20:10,568 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:20:10,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:20:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:20:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 09:20:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:20:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 09:20:10,576 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 09:20:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:10,576 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 09:20:10,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:20:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 09:20:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:20:10,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:10,578 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:10,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 09:20:10,796 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 3 times [2021-05-06 09:20:10,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:10,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140562036] [2021-05-06 09:20:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:10,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:10,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952584367] [2021-05-06 09:20:10,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:10,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:20:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:10,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 09:20:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:20:11,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140562036] [2021-05-06 09:20:11,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952584367] [2021-05-06 09:20:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952584367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:11,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:11,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:20:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914221421] [2021-05-06 09:20:11,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:20:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:20:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:20:11,214 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:20:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:11,452 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2021-05-06 09:20:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:20:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:20:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:11,454 INFO L225 Difference]: With dead ends: 149 [2021-05-06 09:20:11,454 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 09:20:11,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:20:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 09:20:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 09:20:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:20:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 09:20:11,461 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 09:20:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:11,462 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 09:20:11,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:20:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 09:20:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:20:11,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:11,463 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 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] [2021-05-06 09:20:11,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:11,677 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1077967713, now seen corresponding path program 1 times [2021-05-06 09:20:11,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:11,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527187979] [2021-05-06 09:20:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:11,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:11,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140310713] [2021-05-06 09:20:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:20:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:20:11,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:11,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 09:20:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527187979] [2021-05-06 09:20:12,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140310713] [2021-05-06 09:20:12,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140310713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:20:12,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:20:12,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:20:12,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951153124] [2021-05-06 09:20:12,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:20:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:20:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:20:12,070 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:20:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:12,162 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2021-05-06 09:20:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:20:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:20:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:12,164 INFO L225 Difference]: With dead ends: 142 [2021-05-06 09:20:12,164 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 09:20:12,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:20:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 09:20:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 09:20:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 09:20:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 09:20:12,170 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 09:20:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:12,171 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 09:20:12,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:20:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 09:20:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 09:20:12,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:12,172 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:12,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:12,388 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1181205258, now seen corresponding path program 4 times [2021-05-06 09:20:12,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:12,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16598640] [2021-05-06 09:20:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:12,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:12,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045796060] [2021-05-06 09:20:12,397 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 09:20:12,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:20:12,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:12,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:20:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:12,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 09:20:12,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:12,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16598640] [2021-05-06 09:20:12,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:12,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045796060] [2021-05-06 09:20:12,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045796060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:12,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:12,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:20:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386290747] [2021-05-06 09:20:12,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:20:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:20:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:20:12,726 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:20:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:12,925 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2021-05-06 09:20:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:20:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 98 [2021-05-06 09:20:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:12,928 INFO L225 Difference]: With dead ends: 166 [2021-05-06 09:20:12,928 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 09:20:12,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:20:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 09:20:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 09:20:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 25 states have call predecessors, (35), 24 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:20:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 09:20:12,934 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 09:20:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:12,935 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 09:20:12,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:20:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 09:20:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 09:20:12,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:12,937 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:13,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 09:20:13,162 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:13,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1771017874, now seen corresponding path program 2 times [2021-05-06 09:20:13,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:13,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407016526] [2021-05-06 09:20:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:13,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:13,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373895040] [2021-05-06 09:20:13,171 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 09:20:13,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:20:13,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 09:20:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:13,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 09:20:13,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:13,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407016526] [2021-05-06 09:20:13,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:13,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373895040] [2021-05-06 09:20:13,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373895040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:13,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:13,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:20:13,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176849821] [2021-05-06 09:20:13,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:20:13,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:20:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:20:13,540 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:20:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:13,748 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2021-05-06 09:20:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:20:13,748 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), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 09:20:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:13,749 INFO L225 Difference]: With dead ends: 168 [2021-05-06 09:20:13,750 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:20:13,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:20:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:20:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 09:20:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 09:20:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 09:20:13,755 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 09:20:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:13,755 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 09:20:13,755 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), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:20:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 09:20:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 09:20:13,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:13,756 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 09:20:13,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:20:13,973 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash 348272066, now seen corresponding path program 3 times [2021-05-06 09:20:13,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:13,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695302948] [2021-05-06 09:20:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:13,981 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:13,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916844170] [2021-05-06 09:20:13,982 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 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 09:20:14,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:20:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:20:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-05-06 09:20:14,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:14,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695302948] [2021-05-06 09:20:14,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:14,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916844170] [2021-05-06 09:20:14,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916844170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:14,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:14,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 09:20:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465561744] [2021-05-06 09:20:14,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:20:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:20:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:20:14,242 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:20:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:14,267 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2021-05-06 09:20:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:20:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 109 [2021-05-06 09:20:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:14,269 INFO L225 Difference]: With dead ends: 137 [2021-05-06 09:20:14,269 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 09:20:14,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:20:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 09:20:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 09:20:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 86 states have internal predecessors, (92), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:20:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 09:20:14,274 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 09:20:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:14,275 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 09:20:14,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:20:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 09:20:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 09:20:14,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:14,276 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:14,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:20:14,499 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1079108237, now seen corresponding path program 5 times [2021-05-06 09:20:14,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:14,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641151516] [2021-05-06 09:20:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:14,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:14,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699599037] [2021-05-06 09:20:14,506 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 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 09:20:14,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 09:20:14,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 09:20:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:14,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:14,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:15,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:15,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:15,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 09:20:15,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641151516] [2021-05-06 09:20:15,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699599037] [2021-05-06 09:20:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699599037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:15,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:15,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 09:20:15,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811651597] [2021-05-06 09:20:15,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 09:20:15,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 09:20:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:20:15,049 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 09:20:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:15,327 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-05-06 09:20:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 09:20:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2021-05-06 09:20:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:15,329 INFO L225 Difference]: With dead ends: 161 [2021-05-06 09:20:15,329 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 09:20:15,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:20:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 09:20:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-05-06 09:20:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:20:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2021-05-06 09:20:15,335 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 111 [2021-05-06 09:20:15,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:15,335 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2021-05-06 09:20:15,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 09:20:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2021-05-06 09:20:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 09:20:15,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:15,337 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:15,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:20:15,564 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1546710215, now seen corresponding path program 6 times [2021-05-06 09:20:15,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:15,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888774212] [2021-05-06 09:20:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:15,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:15,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708968313] [2021-05-06 09:20:15,576 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 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 09:20:15,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 09:20:15,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:20:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:15,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 133 proven. 16 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-05-06 09:20:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:20:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888774212] [2021-05-06 09:20:15,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:20:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708968313] [2021-05-06 09:20:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708968313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:20:15,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:20:15,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:20:15,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844958052] [2021-05-06 09:20:15,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:20:15,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:20:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:20:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:20:15,955 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 09:20:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:20:16,135 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2021-05-06 09:20:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:20:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-05-06 09:20:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:20:16,140 INFO L225 Difference]: With dead ends: 174 [2021-05-06 09:20:16,141 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 09:20:16,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:20:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 09:20:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 163. [2021-05-06 09:20:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 104 states have internal predecessors, (113), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 09:20:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-05-06 09:20:16,147 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 115 [2021-05-06 09:20:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:20:16,148 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-05-06 09:20:16,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 09:20:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-05-06 09:20:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 09:20:16,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:20:16,149 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:20:16,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 09:20:16,377 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:20:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:20:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash 394679903, now seen corresponding path program 4 times [2021-05-06 09:20:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:20:16,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202277400] [2021-05-06 09:20:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:20:16,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:20:16,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187398803] [2021-05-06 09:20:16,385 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 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 09:20:16,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:20:16,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:20:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:20:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:20:16,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:16,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:18,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:20:19,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:09,387 WARN L205 SmtUtils]: Spent 1.82 m on a formula simplification. DAG size of input: 25308 DAG size of output: 24817 [2021-05-06 09:22:13,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:15,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:22:17,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:24:01,624 WARN L205 SmtUtils]: Spent 1.73 m on a formula simplification. DAG size of input: 25362 DAG size of output: 24864