/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:12:57,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:12:57,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:12:57,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:12:57,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:12:57,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:12:57,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:12:57,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:12:57,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:12:57,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:12:57,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:12:57,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:12:57,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:12:57,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:12:57,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:12:57,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:12:57,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:12:57,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:12:57,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:12:57,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:12:57,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:12:57,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:12:57,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:12:57,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:12:57,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:12:57,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:12:57,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:12:57,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:12:57,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:12:57,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:12:57,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:12:57,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:12:57,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:12:57,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:12:57,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:12:57,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:12:57,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:12:57,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:12:57,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:12:57,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:12:57,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:12:57,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:12:57,177 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:12:57,178 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:12:57,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:12:57,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:12:57,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:12:57,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:12:57,530 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:12:57,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-06 08:12:57,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570039bda/4213dba7fc61416d82ff46eb26831b6b/FLAG84240a441 [2021-05-06 08:12:58,180 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:12:58,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-06 08:12:58,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570039bda/4213dba7fc61416d82ff46eb26831b6b/FLAG84240a441 [2021-05-06 08:12:58,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570039bda/4213dba7fc61416d82ff46eb26831b6b [2021-05-06 08:12:58,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:12:58,585 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:12:58,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:58,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:12:58,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:12:58,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fabb0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58, skipping insertion in model container [2021-05-06 08:12:58,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:12:58,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:12:58,731 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c[489,502] [2021-05-06 08:12:58,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:58,754 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:12:58,805 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c[489,502] [2021-05-06 08:12:58,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:58,839 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:12:58,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58 WrapperNode [2021-05-06 08:12:58,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:58,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:12:58,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:12:58,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:12:58,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... [2021-05-06 08:12:58,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:12:58,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:12:58,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:12:58,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:12:58,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:12:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:12:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:12:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:12:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:12:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:12:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:12:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:12:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:12:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:12:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:12:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:12:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:12:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:12:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:12:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:12:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:12:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:12:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:12:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:12:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:12:59,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:12:59,282 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:12:59,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:59 BoogieIcfgContainer [2021-05-06 08:12:59,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:12:59,284 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:12:59,284 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:12:59,285 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:12:59,287 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:59" (1/1) ... [2021-05-06 08:12:59,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:59 BasicIcfg [2021-05-06 08:12:59,300 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:12:59,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:12:59,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:12:59,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:12:59,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:12:58" (1/4) ... [2021-05-06 08:12:59,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a4a884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:59, skipping insertion in model container [2021-05-06 08:12:59,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:58" (2/4) ... [2021-05-06 08:12:59,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a4a884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:59, skipping insertion in model container [2021-05-06 08:12:59,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:59" (3/4) ... [2021-05-06 08:12:59,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a4a884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:12:59, skipping insertion in model container [2021-05-06 08:12:59,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:59" (4/4) ... [2021-05-06 08:12:59,307 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound50.cJordan [2021-05-06 08:12:59,312 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:12:59,315 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:12:59,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:12:59,362 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:12:59,363 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:12:59,363 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:12:59,363 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:12:59,363 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:12:59,363 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:12:59,364 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:12:59,364 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:12:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:12:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:59,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:59,394 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:59,394 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-06 08:12:59,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:59,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628923221] [2021-05-06 08:12:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:59,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:12:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:59,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:12:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:12:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:59,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:12:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:59,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:12:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:59,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:59,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628923221] [2021-05-06 08:12:59,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628923221] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:59,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:59,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:12:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525327305] [2021-05-06 08:12:59,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:12:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:59,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:12:59,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:59,725 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:59,839 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:12:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:12:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:12:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:59,847 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:12:59,848 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:12:59,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:12:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:12:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:12:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:12:59,888 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 08:12:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:59,888 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:12:59,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:12:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:59,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:59,890 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:59,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:12:59,891 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:59,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-06 08:12:59,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:59,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929446886] [2021-05-06 08:12:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:59,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:59,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741120500] [2021-05-06 08:12:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:13:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:00,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:00,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:00,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929446886] [2021-05-06 08:13:00,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741120500] [2021-05-06 08:13:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741120500] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:00,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:00,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:13:00,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105093492] [2021-05-06 08:13:00,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:13:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:13:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:00,137 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:13:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:00,186 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-06 08:13:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:13:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 08:13:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:00,189 INFO L225 Difference]: With dead ends: 46 [2021-05-06 08:13:00,189 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 08:13:00,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 08:13:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 08:13:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:13:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 08:13:00,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 08:13:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:00,200 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 08:13:00,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:13:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 08:13:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:13:00,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:00,201 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:00,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:13:00,427 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-06 08:13:00,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:00,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232859716] [2021-05-06 08:13:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:00,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271959726] [2021-05-06 08:13:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:13:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:13:00,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:00,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232859716] [2021-05-06 08:13:00,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:00,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271959726] [2021-05-06 08:13:00,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271959726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:00,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:00,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121964559] [2021-05-06 08:13:00,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:00,733 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:13:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:00,874 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-06 08:13:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 08:13:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:00,881 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:13:00,881 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:13:00,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:13:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 08:13:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:13:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 08:13:00,906 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 08:13:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:00,906 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 08:13:00,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:13:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 08:13:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:13:00,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:00,909 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:01,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:01,135 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-06 08:13:01,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:01,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913178964] [2021-05-06 08:13:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:01,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:01,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291986566] [2021-05-06 08:13:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:01,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:13:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:01,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:13:01,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:01,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913178964] [2021-05-06 08:13:01,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:01,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291986566] [2021-05-06 08:13:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291986566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:01,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:01,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:01,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399140956] [2021-05-06 08:13:01,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:01,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:01,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:01,419 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:13:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:01,560 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-06 08:13:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-06 08:13:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:01,563 INFO L225 Difference]: With dead ends: 66 [2021-05-06 08:13:01,564 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:13:01,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:13:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 08:13:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:13:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 08:13:01,577 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 08:13:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:01,582 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 08:13:01,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:13:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 08:13:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:13:01,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:01,584 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:01,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:01,793 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:01,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-06 08:13:01,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:01,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541495102] [2021-05-06 08:13:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:01,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:01,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837229328] [2021-05-06 08:13:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:13:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:13:01,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541495102] [2021-05-06 08:13:01,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837229328] [2021-05-06 08:13:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837229328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:01,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:01,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:13:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789324825] [2021-05-06 08:13:01,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:13:01,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:13:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:01,994 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:13:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:02,030 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-06 08:13:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:13:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 08:13:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:02,036 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:13:02,036 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:13:02,038 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:13:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 08:13:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:13:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 08:13:02,051 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 08:13:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:02,051 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 08:13:02,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:13:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 08:13:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:13:02,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:02,052 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:02,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:02,253 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-06 08:13:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:02,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658483103] [2021-05-06 08:13:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:02,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:02,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877687091] [2021-05-06 08:13:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:13:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:02,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:13:02,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:02,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658483103] [2021-05-06 08:13:02,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:02,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877687091] [2021-05-06 08:13:02,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877687091] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:02,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:02,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:13:02,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932486968] [2021-05-06 08:13:02,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:13:02,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:13:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:02,489 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:13:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:02,537 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 08:13:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:13:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 08:13:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:02,539 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:13:02,539 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:13:02,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:13:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 08:13:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:13:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 08:13:02,545 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 08:13:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:02,546 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 08:13:02,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:13:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 08:13:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:13:02,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:02,547 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:02,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:13:02,753 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-06 08:13:02,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:02,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580252903] [2021-05-06 08:13:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:02,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:02,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955339154] [2021-05-06 08:13:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:13:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:13:02,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580252903] [2021-05-06 08:13:02,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955339154] [2021-05-06 08:13:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955339154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427887143] [2021-05-06 08:13:02,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:02,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:02,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:02,992 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:03,108 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-06 08:13:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 08:13:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:03,110 INFO L225 Difference]: With dead ends: 86 [2021-05-06 08:13:03,110 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:13:03,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:13:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 08:13:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:13:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 08:13:03,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 08:13:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:03,119 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 08:13:03,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 08:13:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:13:03,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:03,120 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:03,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:03,325 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:03,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-06 08:13:03,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:03,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813823310] [2021-05-06 08:13:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:03,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:03,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383907677] [2021-05-06 08:13:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:03,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:13:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:03,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:13:03,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:03,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813823310] [2021-05-06 08:13:03,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:03,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383907677] [2021-05-06 08:13:03,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383907677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:03,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:03,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:03,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063272920] [2021-05-06 08:13:03,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:03,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:03,590 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:03,691 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:13:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:13:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-05-06 08:13:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:03,693 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:13:03,693 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:13:03,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:13:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 08:13:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:13:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 08:13:03,701 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 08:13:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:03,701 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 08:13:03,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 08:13:03,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:13:03,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:03,703 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:03,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:03,919 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-06 08:13:03,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:03,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374383683] [2021-05-06 08:13:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:03,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:03,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744245041] [2021-05-06 08:13:03,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:04,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:13:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:04,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 08:13:04,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:04,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374383683] [2021-05-06 08:13:04,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:04,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744245041] [2021-05-06 08:13:04,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744245041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:04,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:04,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099627223] [2021-05-06 08:13:04,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:04,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:04,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:04,238 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:13:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:04,403 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-06 08:13:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 08:13:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:04,405 INFO L225 Difference]: With dead ends: 135 [2021-05-06 08:13:04,405 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:13:04,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:13:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 08:13:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:13:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 08:13:04,413 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 08:13:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:04,414 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 08:13:04,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:13:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 08:13:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:13:04,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:04,415 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:04,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:13:04,629 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-06 08:13:04,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:04,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578593645] [2021-05-06 08:13:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:04,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:04,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745738347] [2021-05-06 08:13:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:13:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:04,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:13:04,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:04,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578593645] [2021-05-06 08:13:04,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:04,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745738347] [2021-05-06 08:13:04,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745738347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:04,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:04,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072049192] [2021-05-06 08:13:04,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:04,884 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:13:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:04,987 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-06 08:13:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:13:04,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 08:13:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:04,989 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:13:04,989 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 08:13:04,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 08:13:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-06 08:13:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:13:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-06 08:13:04,998 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-06 08:13:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:04,998 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-06 08:13:04,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:13:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-06 08:13:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:13:04,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:04,999 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:05,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:05,213 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-06 08:13:05,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:05,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765721582] [2021-05-06 08:13:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:05,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:05,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127877397] [2021-05-06 08:13:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:05,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:05,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:05,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:13:05,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:05,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:13:05,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:05,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765721582] [2021-05-06 08:13:05,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:05,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127877397] [2021-05-06 08:13:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127877397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:05,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:05,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:05,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874871052] [2021-05-06 08:13:05,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:05,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:05,488 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:13:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:05,581 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-06 08:13:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:13:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 08:13:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:05,583 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:13:05,583 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:13:05,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:13:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-06 08:13:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-06 08:13:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 08:13:05,596 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-06 08:13:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:05,596 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 08:13:05,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:13:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 08:13:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:13:05,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:05,601 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:05,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:05,817 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-06 08:13:05,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:05,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314136564] [2021-05-06 08:13:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:05,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:05,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124257361] [2021-05-06 08:13:05,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:05,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:05,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:13:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:05,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:05,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 08:13:06,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314136564] [2021-05-06 08:13:06,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124257361] [2021-05-06 08:13:06,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124257361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:06,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:06,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:13:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846922157] [2021-05-06 08:13:06,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:13:06,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:13:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:06,435 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:13:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:07,249 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-06 08:13:07,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:13:07,250 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 08:13:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:07,251 INFO L225 Difference]: With dead ends: 188 [2021-05-06 08:13:07,251 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 08:13:07,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:13:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 08:13:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-06 08:13:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 08:13:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:13:07,260 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-06 08:13:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:07,260 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:13:07,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:13:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:13:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:13:07,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:07,262 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:07,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:13:07,484 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-06 08:13:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:07,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927486255] [2021-05-06 08:13:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:07,508 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:07,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205473185] [2021-05-06 08:13:07,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:07,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:13:07,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:13:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:07,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:07,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:08,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:08,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:08,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-06 08:13:08,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927486255] [2021-05-06 08:13:08,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205473185] [2021-05-06 08:13:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205473185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:08,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:08,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:13:08,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340080497] [2021-05-06 08:13:08,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:13:08,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:13:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:08,046 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:13:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:08,644 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-06 08:13:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 08:13:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:08,646 INFO L225 Difference]: With dead ends: 211 [2021-05-06 08:13:08,646 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:13:08,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:13:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-06 08:13:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 08:13:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-06 08:13:08,655 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-06 08:13:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:08,655 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-06 08:13:08,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:13:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-06 08:13:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:13:08,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:08,657 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:08,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:13:08,882 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:08,883 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-06 08:13:08,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:08,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836652041] [2021-05-06 08:13:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:08,891 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:08,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472340814] [2021-05-06 08:13:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:08,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:13:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:13:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 08:13:09,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836652041] [2021-05-06 08:13:09,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472340814] [2021-05-06 08:13:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472340814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:09,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:09,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:13:09,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857208624] [2021-05-06 08:13:09,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:13:09,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:13:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:09,231 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:09,761 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-06 08:13:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 08:13:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:09,763 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:13:09,763 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 08:13:09,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 08:13:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-06 08:13:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:13:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-06 08:13:09,782 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-06 08:13:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:09,783 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-06 08:13:09,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-06 08:13:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:13:09,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:09,784 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:09,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:13:09,997 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-06 08:13:09,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:09,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035151695] [2021-05-06 08:13:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:10,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:10,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591607238] [2021-05-06 08:13:10,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:10,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:13:10,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:13:10,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:11,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:11,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 08:13:11,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035151695] [2021-05-06 08:13:11,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591607238] [2021-05-06 08:13:11,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591607238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:11,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:11,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:13:11,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872274929] [2021-05-06 08:13:11,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:13:11,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:13:11,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:11,207 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:13,165 INFO L93 Difference]: Finished difference Result 198 states and 249 transitions. [2021-05-06 08:13:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:13:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 08:13:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:13,166 INFO L225 Difference]: With dead ends: 198 [2021-05-06 08:13:13,166 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 08:13:13,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 971.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:13:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 08:13:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-06 08:13:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 54 states have call successors, (54), 25 states have call predecessors, (54), 24 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:13:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-05-06 08:13:13,174 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 79 [2021-05-06 08:13:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:13,174 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-05-06 08:13:13,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-05-06 08:13:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:13:13,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:13,175 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:13,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:13,393 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-06 08:13:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229753198] [2021-05-06 08:13:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:13,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:13,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63102583] [2021-05-06 08:13:13,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:13,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:13:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:13:13,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:13,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 08:13:13,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:13,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229753198] [2021-05-06 08:13:13,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:13,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63102583] [2021-05-06 08:13:13,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63102583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:13,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:13,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4245831] [2021-05-06 08:13:13,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:13,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:13,641 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:13:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:13,711 INFO L93 Difference]: Finished difference Result 221 states and 280 transitions. [2021-05-06 08:13:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:13:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-05-06 08:13:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:13,714 INFO L225 Difference]: With dead ends: 221 [2021-05-06 08:13:13,714 INFO L226 Difference]: Without dead ends: 221 [2021-05-06 08:13:13,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-06 08:13:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-05-06 08:13:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 124 states have internal predecessors, (139), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:13:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2021-05-06 08:13:13,727 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 87 [2021-05-06 08:13:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:13,730 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2021-05-06 08:13:13,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:13:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2021-05-06 08:13:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:13:13,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:13,733 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:13,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:13:13,937 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-06 08:13:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:13,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923343308] [2021-05-06 08:13:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:13,944 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080048453] [2021-05-06 08:13:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:14,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:13:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:13:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:14,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:13:14,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923343308] [2021-05-06 08:13:14,223 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080048453] [2021-05-06 08:13:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080048453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:14,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100252091] [2021-05-06 08:13:14,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:14,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:14,226 INFO L87 Difference]: Start difference. First operand 208 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:13:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:14,364 INFO L93 Difference]: Finished difference Result 231 states and 294 transitions. [2021-05-06 08:13:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 08:13:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:14,366 INFO L225 Difference]: With dead ends: 231 [2021-05-06 08:13:14,366 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 08:13:14,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 08:13:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 08:13:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 69 states have call successors, (69), 28 states have call predecessors, (69), 27 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-06 08:13:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-05-06 08:13:14,378 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 87 [2021-05-06 08:13:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:14,379 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-05-06 08:13:14,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:13:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-05-06 08:13:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:13:14,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:14,381 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:14,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:13:14,593 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-06 08:13:14,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:14,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809351874] [2021-05-06 08:13:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:14,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:14,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521569655] [2021-05-06 08:13:14,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:13:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:14,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:13:14,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:14,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809351874] [2021-05-06 08:13:14,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:14,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521569655] [2021-05-06 08:13:14,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521569655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:14,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:14,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3553722] [2021-05-06 08:13:14,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:14,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:14,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:14,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:14,859 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:13:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:15,096 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2021-05-06 08:13:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 08:13:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:15,099 INFO L225 Difference]: With dead ends: 241 [2021-05-06 08:13:15,099 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 08:13:15,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:15,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 08:13:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-06 08:13:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:13:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 08:13:15,107 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 08:13:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:15,107 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 08:13:15,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:13:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 08:13:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:13:15,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:15,108 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:15,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:13:15,309 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:15,310 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-06 08:13:15,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:15,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83469892] [2021-05-06 08:13:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:15,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:15,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864089263] [2021-05-06 08:13:15,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:15,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:13:15,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:15,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:13:15,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83469892] [2021-05-06 08:13:15,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864089263] [2021-05-06 08:13:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864089263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:15,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:15,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:15,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100146332] [2021-05-06 08:13:15,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:15,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:15,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:15,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:15,569 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:13:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:15,731 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2021-05-06 08:13:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 08:13:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:15,733 INFO L225 Difference]: With dead ends: 252 [2021-05-06 08:13:15,733 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 08:13:15,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 08:13:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-05-06 08:13:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:13:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 08:13:15,741 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 08:13:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:15,741 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 08:13:15,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:13:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 08:13:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:13:15,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:15,742 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:15,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:15,957 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-06 08:13:15,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:15,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123123852] [2021-05-06 08:13:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:15,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:15,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675589576] [2021-05-06 08:13:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:16,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:13:16,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:16,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:13:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 08:13:16,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123123852] [2021-05-06 08:13:16,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675589576] [2021-05-06 08:13:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675589576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:16,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:16,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:16,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945830349] [2021-05-06 08:13:16,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:16,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:16,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:16,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:16,208 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:13:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:16,281 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2021-05-06 08:13:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:13:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-05-06 08:13:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:16,283 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:13:16,283 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 08:13:16,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 08:13:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-05-06 08:13:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 08:13:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 295 transitions. [2021-05-06 08:13:16,294 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 295 transitions. Word has length 87 [2021-05-06 08:13:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:16,294 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 295 transitions. [2021-05-06 08:13:16,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:13:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 295 transitions. [2021-05-06 08:13:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:13:16,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:16,295 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:16,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:16,521 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-06 08:13:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:16,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622882747] [2021-05-06 08:13:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:16,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:16,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456213559] [2021-05-06 08:13:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:16,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:13:16,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:13:16,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:16,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:13:16,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622882747] [2021-05-06 08:13:16,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456213559] [2021-05-06 08:13:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456213559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:16,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:16,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:13:16,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570254708] [2021-05-06 08:13:16,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:13:16,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:13:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:16,807 INFO L87 Difference]: Start difference. First operand 237 states and 295 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:13:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:17,029 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2021-05-06 08:13:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2021-05-06 08:13:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:17,031 INFO L225 Difference]: With dead ends: 269 [2021-05-06 08:13:17,032 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 08:13:17,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:17,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 08:13:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-05-06 08:13:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 141 states have internal predecessors, (155), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:13:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 08:13:17,039 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 92 [2021-05-06 08:13:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:17,040 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 08:13:17,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:13:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 08:13:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:13:17,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:17,041 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:17,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:13:17,257 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 10 times [2021-05-06 08:13:17,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:17,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122133384] [2021-05-06 08:13:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:17,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:17,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430660983] [2021-05-06 08:13:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:17,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:13:17,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:13:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:17,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-06 08:13:17,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122133384] [2021-05-06 08:13:17,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430660983] [2021-05-06 08:13:17,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430660983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:17,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:17,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:13:17,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812013882] [2021-05-06 08:13:17,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:13:17,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:13:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:17,655 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:13:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:18,199 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 08:13:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 08:13:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:18,204 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:13:18,204 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:13:18,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:13:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-05-06 08:13:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 150 states have internal predecessors, (165), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:13:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-05-06 08:13:18,212 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 92 [2021-05-06 08:13:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:18,213 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-05-06 08:13:18,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:13:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-05-06 08:13:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:13:18,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:18,214 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:18,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:13:18,429 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 11 times [2021-05-06 08:13:18,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:18,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395356459] [2021-05-06 08:13:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:18,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:18,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563933695] [2021-05-06 08:13:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:13:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:13:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 08:13:19,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:19,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395356459] [2021-05-06 08:13:19,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:19,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563933695] [2021-05-06 08:13:19,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563933695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:19,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:19,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494558553] [2021-05-06 08:13:19,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:19,325 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:13:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:19,649 INFO L93 Difference]: Finished difference Result 268 states and 325 transitions. [2021-05-06 08:13:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 08:13:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:19,651 INFO L225 Difference]: With dead ends: 268 [2021-05-06 08:13:19,652 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 08:13:19,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 08:13:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2021-05-06 08:13:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 151 states have internal predecessors, (167), 63 states have call successors, (63), 34 states have call predecessors, (63), 33 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:13:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2021-05-06 08:13:19,660 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 92 [2021-05-06 08:13:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:19,661 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2021-05-06 08:13:19,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:13:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2021-05-06 08:13:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:13:19,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:19,663 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:19,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:19,874 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 12 times [2021-05-06 08:13:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:19,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887761046] [2021-05-06 08:13:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:19,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:19,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920523629] [2021-05-06 08:13:19,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:20,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:13:20,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:13:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:20,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-05-06 08:13:20,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:20,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887761046] [2021-05-06 08:13:20,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:20,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920523629] [2021-05-06 08:13:20,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920523629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:20,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:20,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:13:20,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370139239] [2021-05-06 08:13:20,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:13:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:13:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:13:20,839 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:13:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:21,942 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2021-05-06 08:13:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:13:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-05-06 08:13:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:21,944 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:13:21,944 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 08:13:21,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:13:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 08:13:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2021-05-06 08:13:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:13:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 300 transitions. [2021-05-06 08:13:21,952 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 300 transitions. Word has length 92 [2021-05-06 08:13:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:21,953 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 300 transitions. [2021-05-06 08:13:21,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:13:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 300 transitions. [2021-05-06 08:13:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:13:21,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:21,954 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:22,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:13:22,162 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 13 times [2021-05-06 08:13:22,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:22,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640902532] [2021-05-06 08:13:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:22,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:22,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314537571] [2021-05-06 08:13:22,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 08:13:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:22,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 59 proven. 47 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 08:13:22,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640902532] [2021-05-06 08:13:22,524 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314537571] [2021-05-06 08:13:22,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314537571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:22,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:22,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:13:22,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77532949] [2021-05-06 08:13:22,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:13:22,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:13:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:22,527 INFO L87 Difference]: Start difference. First operand 254 states and 300 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:13:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:22,935 INFO L93 Difference]: Finished difference Result 304 states and 364 transitions. [2021-05-06 08:13:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2021-05-06 08:13:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:22,937 INFO L225 Difference]: With dead ends: 304 [2021-05-06 08:13:22,937 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 08:13:22,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 08:13:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-05-06 08:13:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.1222222222222222) internal successors, (202), 185 states have internal predecessors, (202), 74 states have call successors, (74), 42 states have call predecessors, (74), 41 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:13:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-05-06 08:13:22,945 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 97 [2021-05-06 08:13:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:22,945 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-05-06 08:13:22,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:13:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-05-06 08:13:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:13:22,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:22,946 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:23,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:23,161 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 14 times [2021-05-06 08:13:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882207014] [2021-05-06 08:13:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:23,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:23,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880986789] [2021-05-06 08:13:23,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:23,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:23,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:13:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:23,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,158 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1624 DAG size of output: 1491 [2021-05-06 08:14:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,466 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1563 DAG size of output: 1431 [2021-05-06 08:14:41,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,989 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2117 DAG size of output: 2062 [2021-05-06 08:14:42,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:42,630 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1763 DAG size of output: 1548