/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/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:20:57,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:20:57,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:20:57,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:20:57,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:20:57,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:20:57,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:20:57,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:20:57,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:20:57,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:20:57,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:20:57,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:20:57,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:20:57,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:20:57,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:20:57,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:20:57,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:20:57,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:20:57,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:20:57,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:20:57,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:20:57,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:20:57,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:20:57,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:20:57,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:20:57,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:20:57,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:20:57,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:20:57,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:20:57,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:20:57,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:20:57,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:20:57,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:20:57,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:20:57,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:20:57,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:20:57,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:20:57,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:20:57,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:20:57,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:20:57,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:20:57,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:20:57,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:20:57,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:20:57,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:20:57,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:20:57,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:20:57,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:20:57,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:20:57,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:20:57,251 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:20:57,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:20:57,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:20:57,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:20:57,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:20:57,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:20:57,569 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:20:57,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2021-05-06 08:20:57,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fb082b5/75b6c009bccb450db14f942d7ca273bc/FLAGcec375a6a [2021-05-06 08:20:57,947 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:20:57,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2021-05-06 08:20:57,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fb082b5/75b6c009bccb450db14f942d7ca273bc/FLAGcec375a6a [2021-05-06 08:20:58,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fb082b5/75b6c009bccb450db14f942d7ca273bc [2021-05-06 08:20:58,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:20:58,361 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:20:58,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:58,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:20:58,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:20:58,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe2d13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58, skipping insertion in model container [2021-05-06 08:20:58,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:20:58,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:20:58,525 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/egcd3-ll_unwindbound20.c[490,503] [2021-05-06 08:20:58,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:58,568 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:20:58,579 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/egcd3-ll_unwindbound20.c[490,503] [2021-05-06 08:20:58,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:58,613 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:20:58,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58 WrapperNode [2021-05-06 08:20:58,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:58,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:20:58,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:20:58,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:20:58,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (1/1) ... [2021-05-06 08:20:58,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:20:58,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:20:58,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:20:58,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:20:58,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (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 08:20:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:20:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:20:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:20:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:20:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:20:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:20:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:20:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:20:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:20:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:20:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:20:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:20:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:20:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:20:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:20:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:20:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:20:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:20:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:20:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:20:59,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:20:59,106 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:20:59,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:59 BoogieIcfgContainer [2021-05-06 08:20:59,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:20:59,108 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:20:59,108 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:20:59,108 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:20:59,111 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:59" (1/1) ... [2021-05-06 08:20:59,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:59 BasicIcfg [2021-05-06 08:20:59,124 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:20:59,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:20:59,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:20:59,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:20:59,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:20:58" (1/4) ... [2021-05-06 08:20:59,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e811968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:59, skipping insertion in model container [2021-05-06 08:20:59,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:58" (2/4) ... [2021-05-06 08:20:59,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e811968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:59, skipping insertion in model container [2021-05-06 08:20:59,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:59" (3/4) ... [2021-05-06 08:20:59,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e811968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:59, skipping insertion in model container [2021-05-06 08:20:59,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:59" (4/4) ... [2021-05-06 08:20:59,130 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.cJordan [2021-05-06 08:20:59,140 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:20:59,143 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:20:59,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:20:59,182 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:20:59,182 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:20:59,182 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:20:59,182 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:20:59,182 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:20:59,182 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:20:59,183 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:20:59,183 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:20:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:20:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:20:59,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:59,215 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:59,215 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-06 08:20:59,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:59,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532962745] [2021-05-06 08:20:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:20:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:20:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:59,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:20:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:59,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:59,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532962745] [2021-05-06 08:20:59,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532962745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:59,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:59,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:20:59,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189411299] [2021-05-06 08:20:59,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:20:59,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:20:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:59,539 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:59,737 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-06 08:20:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:20:59,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:20:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:59,745 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:20:59,745 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:20:59,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:20:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 08:20:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 08:20:59,793 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 08:20:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:59,793 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 08:20:59,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 08:20:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:20:59,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:59,795 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:59,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:20:59,795 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-06 08:20:59,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:59,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190503375] [2021-05-06 08:20:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:59,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:59,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519909701] [2021-05-06 08:20:59,814 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 08:20:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:59,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:20:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:59,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:59,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:59,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:00,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:00,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190503375] [2021-05-06 08:21:00,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:00,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519909701] [2021-05-06 08:21:00,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519909701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:00,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:00,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:21:00,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968647722] [2021-05-06 08:21:00,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:21:00,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:21:00,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:21:00,027 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:00,040 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:21:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:21:00,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:21:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:00,042 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:21:00,042 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:21:00,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:21:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:21:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 08:21:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 08:21:00,049 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 08:21:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:00,050 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 08:21:00,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 08:21:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 08:21:00,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:00,051 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:00,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:21:00,279 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-06 08:21:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:00,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443902943] [2021-05-06 08:21:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:00,296 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:00,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547408648] [2021-05-06 08:21:00,296 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 08:21:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:21:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:00,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:00,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:00,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443902943] [2021-05-06 08:21:00,494 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:00,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547408648] [2021-05-06 08:21:00,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547408648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:00,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:00,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:21:00,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007375604] [2021-05-06 08:21:00,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:21:00,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:21:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:00,496 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:00,560 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-06 08:21:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 08:21:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:00,562 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:21:00,562 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:21:00,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:21:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 08:21:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 08:21:00,571 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 08:21:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:00,572 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 08:21:00,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 08:21:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:21:00,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:00,573 INFO L523 BasicCegarLoop]: trace histogram [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 08:21:00,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:00,797 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-06 08:21:00,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:00,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679752359] [2021-05-06 08:21:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:00,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:00,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549913659] [2021-05-06 08:21:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:21:00,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:01,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679752359] [2021-05-06 08:21:01,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549913659] [2021-05-06 08:21:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549913659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:01,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:01,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:01,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782371620] [2021-05-06 08:21:01,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:01,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:01,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:01,031 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:01,080 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 08:21:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:21:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 08:21:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:01,082 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:21:01,082 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 08:21:01,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 08:21:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 08:21:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:21:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 08:21:01,088 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 08:21:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:01,088 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 08:21:01,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 08:21:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:21:01,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:01,090 INFO L523 BasicCegarLoop]: trace histogram [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 08:21:01,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:01,301 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-06 08:21:01,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:01,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924727496] [2021-05-06 08:21:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:01,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415718495] [2021-05-06 08:21:01,325 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 08:21:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:21:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:01,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:01,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:01,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924727496] [2021-05-06 08:21:01,543 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:01,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415718495] [2021-05-06 08:21:01,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415718495] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:01,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:01,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:21:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745138699] [2021-05-06 08:21:01,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:01,551 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:01,647 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-06 08:21:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 08:21:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:01,651 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:21:01,651 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:21:01,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:21:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:21:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:21:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 08:21:01,673 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 08:21:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:01,673 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 08:21:01,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 08:21:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:21:01,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:01,674 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:01,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:01,889 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-06 08:21:01,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:01,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744191688] [2021-05-06 08:21:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:01,901 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:01,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702985456] [2021-05-06 08:21:01,901 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 08:21:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:01,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:21:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:01,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:02,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:02,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744191688] [2021-05-06 08:21:02,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:02,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702985456] [2021-05-06 08:21:02,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702985456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:02,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:02,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:21:02,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179305312] [2021-05-06 08:21:02,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:21:02,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:21:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:02,091 INFO L87 Difference]: Start difference. First operand 55 states and 72 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:02,134 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-06 08:21:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:21:02,134 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-06 08:21:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:02,137 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:21:02,137 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:21:02,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:21:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:21:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:21:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 08:21:02,156 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 08:21:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:02,156 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 08:21:02,156 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 08:21:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 08:21:02,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:02,157 INFO L523 BasicCegarLoop]: trace histogram [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 08:21:02,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:21:02,358 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:02,358 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-06 08:21:02,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:02,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369836526] [2021-05-06 08:21:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:02,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:02,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615909128] [2021-05-06 08:21:02,370 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 08:21:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:21:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:02,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:02,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369836526] [2021-05-06 08:21:02,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:02,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615909128] [2021-05-06 08:21:02,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615909128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:02,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:02,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:02,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434909819] [2021-05-06 08:21:02,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:02,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:02,551 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:02,745 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-06 08:21:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:21:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-06 08:21:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:02,747 INFO L225 Difference]: With dead ends: 131 [2021-05-06 08:21:02,747 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:21:02,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:21:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 08:21:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:21:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 08:21:02,756 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 08:21:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:02,756 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 08:21:02,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 08:21:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:21:02,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:02,758 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:02,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:02,981 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-06 08:21:02,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:02,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113391717] [2021-05-06 08:21:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:02,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:02,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749622081] [2021-05-06 08:21:02,994 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 08:21:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:21:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:03,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:03,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:03,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113391717] [2021-05-06 08:21:03,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:03,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749622081] [2021-05-06 08:21:03,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749622081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:03,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:03,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:21:03,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781101949] [2021-05-06 08:21:03,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:03,189 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:03,274 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-06 08:21:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 08:21:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:03,275 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:21:03,275 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:21:03,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:21:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:21:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:21:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 08:21:03,280 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 08:21:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:03,281 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 08:21:03,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 08:21:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:21:03,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:03,282 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:03,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:03,507 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-06 08:21:03,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:03,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135437273] [2021-05-06 08:21:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:03,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:03,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267815773] [2021-05-06 08:21:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:03,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:21:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:03,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:03,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:03,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135437273] [2021-05-06 08:21:03,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:03,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267815773] [2021-05-06 08:21:03,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267815773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:03,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:03,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:21:03,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426061587] [2021-05-06 08:21:03,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:21:03,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:21:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:03,704 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:03,731 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-06 08:21:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-06 08:21:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:03,735 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:21:03,735 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:21:03,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:21:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 08:21:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:21:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 08:21:03,745 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 08:21:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:03,745 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 08:21:03,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 08:21:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:21:03,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:03,748 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:03,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:21:03,972 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-06 08:21:03,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:03,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569534929] [2021-05-06 08:21:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:03,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:03,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195499728] [2021-05-06 08:21:03,983 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 08:21:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:21:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:04,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:04,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569534929] [2021-05-06 08:21:04,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195499728] [2021-05-06 08:21:04,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195499728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:04,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:04,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:21:04,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210453301] [2021-05-06 08:21:04,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:21:04,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:21:04,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:04,146 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:04,208 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-06 08:21:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:21:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:04,211 INFO L225 Difference]: With dead ends: 120 [2021-05-06 08:21:04,211 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 08:21:04,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 08:21:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 08:21:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:21:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 08:21:04,220 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 08:21:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:04,220 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 08:21:04,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 08:21:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:21:04,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:04,224 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:04,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:04,441 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-06 08:21:04,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:04,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266971006] [2021-05-06 08:21:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:04,450 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:04,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680768670] [2021-05-06 08:21:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:21:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:04,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:21:04,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266971006] [2021-05-06 08:21:04,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:04,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680768670] [2021-05-06 08:21:04,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680768670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:04,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:04,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:21:04,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917396129] [2021-05-06 08:21:04,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:04,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:04,645 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:04,790 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-06 08:21:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:21:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:21:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:04,793 INFO L225 Difference]: With dead ends: 152 [2021-05-06 08:21:04,793 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:21:04,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:21:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 08:21:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:21:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 08:21:04,800 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 08:21:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:04,801 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 08:21:04,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 08:21:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:21:04,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:04,803 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:05,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:05,021 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-06 08:21:05,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:05,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73201728] [2021-05-06 08:21:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:05,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:05,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889778879] [2021-05-06 08:21:05,038 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 08:21:05,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:05,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:21:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:05,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:05,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:05,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73201728] [2021-05-06 08:21:05,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:05,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889778879] [2021-05-06 08:21:05,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889778879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:05,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:05,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:05,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355788394] [2021-05-06 08:21:05,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:05,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:05,213 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:05,295 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-06 08:21:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-06 08:21:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:05,297 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:21:05,297 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:21:05,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:21:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 08:21:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:21:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 08:21:05,306 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 08:21:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:05,306 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 08:21:05,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 08:21:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:21:05,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:05,308 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:05,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:21:05,513 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-06 08:21:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:05,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21699049] [2021-05-06 08:21:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:05,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:05,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626253324] [2021-05-06 08:21:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:21:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:05,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:21:05,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21699049] [2021-05-06 08:21:05,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626253324] [2021-05-06 08:21:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626253324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:05,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:05,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:21:05,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142537177] [2021-05-06 08:21:05,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:05,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:05,688 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:21:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:05,826 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-06 08:21:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:21:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:21:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:05,830 INFO L225 Difference]: With dead ends: 193 [2021-05-06 08:21:05,830 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:21:05,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:21:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:21:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:21:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 08:21:05,839 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 08:21:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:05,839 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 08:21:05,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:21:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 08:21:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:21:05,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:05,840 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:06,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:21:06,057 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-06 08:21:06,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:06,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524652874] [2021-05-06 08:21:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:06,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:06,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924683100] [2021-05-06 08:21:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:21:06,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:06,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:06,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:06,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524652874] [2021-05-06 08:21:06,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924683100] [2021-05-06 08:21:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924683100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:06,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:06,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404897986] [2021-05-06 08:21:06,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:06,303 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:06,539 INFO L93 Difference]: Finished difference Result 202 states and 261 transitions. [2021-05-06 08:21:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:21:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 08:21:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:06,541 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:21:06,541 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:21:06,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:21:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 08:21:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:21:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 08:21:06,548 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 08:21:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:06,548 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 08:21:06,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:21:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 08:21:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:21:06,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:06,549 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:06,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:21:06,770 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:06,771 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-06 08:21:06,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:06,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948448569] [2021-05-06 08:21:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:06,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:06,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053547699] [2021-05-06 08:21:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:21:06,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:06,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:21:06,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:06,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948448569] [2021-05-06 08:21:06,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:06,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053547699] [2021-05-06 08:21:06,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053547699] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:06,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:06,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:06,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689500585] [2021-05-06 08:21:06,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:06,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:06,956 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:21:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:06,999 INFO L93 Difference]: Finished difference Result 262 states and 359 transitions. [2021-05-06 08:21:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:21:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-06 08:21:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:07,001 INFO L225 Difference]: With dead ends: 262 [2021-05-06 08:21:07,002 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 08:21:07,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 08:21:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 08:21:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 08:21:07,011 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 08:21:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:07,011 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 08:21:07,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:21:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 08:21:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:21:07,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:07,012 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:07,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:07,237 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:07,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:07,237 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-06 08:21:07,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:07,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289847320] [2021-05-06 08:21:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:07,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:07,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797112753] [2021-05-06 08:21:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:21:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:21:07,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:07,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289847320] [2021-05-06 08:21:07,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797112753] [2021-05-06 08:21:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797112753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:07,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:07,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865225058] [2021-05-06 08:21:07,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:07,435 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:07,520 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2021-05-06 08:21:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-06 08:21:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:07,522 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:21:07,522 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:21:07,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:21:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 08:21:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 08:21:07,530 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 08:21:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:07,531 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 08:21:07,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 08:21:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:21:07,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:07,532 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:21:07,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:21:07,756 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-06 08:21:07,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:07,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494387967] [2021-05-06 08:21:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:07,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:07,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548025760] [2021-05-06 08:21:07,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:07,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:07,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:21:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:07,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 08:21:07,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:07,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494387967] [2021-05-06 08:21:07,910 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:07,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548025760] [2021-05-06 08:21:07,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548025760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:07,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:07,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:07,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299483389] [2021-05-06 08:21:07,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:07,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:07,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:07,911 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:08,016 INFO L93 Difference]: Finished difference Result 379 states and 553 transitions. [2021-05-06 08:21:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-06 08:21:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:08,018 INFO L225 Difference]: With dead ends: 379 [2021-05-06 08:21:08,018 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 08:21:08,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 08:21:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 08:21:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 08:21:08,030 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 08:21:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:08,030 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 08:21:08,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 08:21:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:21:08,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:08,031 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:08,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:21:08,256 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-06 08:21:08,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:08,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255142794] [2021-05-06 08:21:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:08,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:08,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128798323] [2021-05-06 08:21:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order 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 08:21:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:21:08,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:08,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:21:08,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:08,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255142794] [2021-05-06 08:21:08,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:08,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128798323] [2021-05-06 08:21:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128798323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:08,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:08,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:08,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809213411] [2021-05-06 08:21:08,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:08,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:08,482 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:21:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:08,746 INFO L93 Difference]: Finished difference Result 339 states and 477 transitions. [2021-05-06 08:21:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 08:21:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:08,748 INFO L225 Difference]: With dead ends: 339 [2021-05-06 08:21:08,748 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 08:21:08,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 08:21:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 08:21:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:21:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 08:21:08,758 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 08:21:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:08,759 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 08:21:08,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:21:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 08:21:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 08:21:08,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:08,760 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:08,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:21:08,973 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-06 08:21:08,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:08,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690308907] [2021-05-06 08:21:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:08,981 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:08,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206549284] [2021-05-06 08:21:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:21:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:21:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:09,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:21:09,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:09,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690308907] [2021-05-06 08:21:09,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:09,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206549284] [2021-05-06 08:21:09,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206549284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:09,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:09,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:09,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584293246] [2021-05-06 08:21:09,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:09,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:09,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:09,316 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:09,755 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2021-05-06 08:21:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-06 08:21:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:09,757 INFO L225 Difference]: With dead ends: 341 [2021-05-06 08:21:09,757 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:21:09,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:21:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 08:21:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 08:21:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 08:21:09,769 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 08:21:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:09,769 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 08:21:09,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 08:21:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:21:09,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:09,770 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:09,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:09,987 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:09,987 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-06 08:21:09,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:09,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30006894] [2021-05-06 08:21:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:09,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:09,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602371635] [2021-05-06 08:21:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:21:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:21:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:10,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:10,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:10,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30006894] [2021-05-06 08:21:10,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:10,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602371635] [2021-05-06 08:21:10,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602371635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:10,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:10,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:21:10,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501564321] [2021-05-06 08:21:10,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:10,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:10,228 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:10,333 INFO L93 Difference]: Finished difference Result 399 states and 532 transitions. [2021-05-06 08:21:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-06 08:21:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:10,337 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:21:10,337 INFO L226 Difference]: Without dead ends: 399 [2021-05-06 08:21:10,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-06 08:21:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 385. [2021-05-06 08:21:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 261 states have (on average 1.2835249042145593) internal successors, (335), 269 states have internal predecessors, (335), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:21:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 519 transitions. [2021-05-06 08:21:10,348 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 519 transitions. Word has length 63 [2021-05-06 08:21:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:10,349 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 519 transitions. [2021-05-06 08:21:10,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 519 transitions. [2021-05-06 08:21:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:21:10,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:10,350 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:10,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:10,565 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-06 08:21:10,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:10,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647372998] [2021-05-06 08:21:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:10,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:10,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119881823] [2021-05-06 08:21:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:21:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:10,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:21:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:10,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:10,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647372998] [2021-05-06 08:21:10,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119881823] [2021-05-06 08:21:10,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119881823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:10,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:10,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:10,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089027074] [2021-05-06 08:21:10,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:10,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:10,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:10,793 INFO L87 Difference]: Start difference. First operand 385 states and 519 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:10,932 INFO L93 Difference]: Finished difference Result 484 states and 635 transitions. [2021-05-06 08:21:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-06 08:21:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:10,934 INFO L225 Difference]: With dead ends: 484 [2021-05-06 08:21:10,934 INFO L226 Difference]: Without dead ends: 484 [2021-05-06 08:21:10,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-06 08:21:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 462. [2021-05-06 08:21:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 312 states have (on average 1.266025641025641) internal successors, (395), 325 states have internal predecessors, (395), 110 states have call successors, (110), 40 states have call predecessors, (110), 39 states have return successors, (107), 96 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:21:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 612 transitions. [2021-05-06 08:21:10,947 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 612 transitions. Word has length 64 [2021-05-06 08:21:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:10,948 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 612 transitions. [2021-05-06 08:21:10,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 612 transitions. [2021-05-06 08:21:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:21:10,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:10,949 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:11,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:21:11,165 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-06 08:21:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:11,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615727470] [2021-05-06 08:21:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:11,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:11,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690337514] [2021-05-06 08:21:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:21:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:11,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:11,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:21:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615727470] [2021-05-06 08:21:11,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690337514] [2021-05-06 08:21:11,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690337514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:11,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:11,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887860625] [2021-05-06 08:21:11,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:11,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:11,428 INFO L87 Difference]: Start difference. First operand 462 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:21:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:11,609 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2021-05-06 08:21:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-06 08:21:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:11,612 INFO L225 Difference]: With dead ends: 504 [2021-05-06 08:21:11,612 INFO L226 Difference]: Without dead ends: 504 [2021-05-06 08:21:11,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-06 08:21:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 480. [2021-05-06 08:21:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 324 states have (on average 1.2592592592592593) internal successors, (408), 337 states have internal predecessors, (408), 113 states have call successors, (113), 43 states have call predecessors, (113), 42 states have return successors, (110), 99 states have call predecessors, (110), 110 states have call successors, (110) [2021-05-06 08:21:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 631 transitions. [2021-05-06 08:21:11,627 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 631 transitions. Word has length 67 [2021-05-06 08:21:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:11,628 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 631 transitions. [2021-05-06 08:21:11,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:21:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 631 transitions. [2021-05-06 08:21:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:21:11,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:11,629 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:11,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:21:11,845 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-06 08:21:11,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:11,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865886050] [2021-05-06 08:21:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:11,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:11,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195209501] [2021-05-06 08:21:11,853 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 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 08:21:11,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:21:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:11,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:12,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865886050] [2021-05-06 08:21:12,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195209501] [2021-05-06 08:21:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195209501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:12,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:12,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218107438] [2021-05-06 08:21:12,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:12,036 INFO L87 Difference]: Start difference. First operand 480 states and 631 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:12,406 INFO L93 Difference]: Finished difference Result 816 states and 1192 transitions. [2021-05-06 08:21:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:12,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-06 08:21:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:12,410 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:21:12,410 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:21:12,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:21:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 542. [2021-05-06 08:21:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.2837837837837838) internal successors, (475), 383 states have internal predecessors, (475), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:21:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 730 transitions. [2021-05-06 08:21:12,430 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 730 transitions. Word has length 65 [2021-05-06 08:21:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:12,430 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 730 transitions. [2021-05-06 08:21:12,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 730 transitions. [2021-05-06 08:21:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:21:12,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:12,432 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:12,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:12,645 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-06 08:21:12,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:12,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610118620] [2021-05-06 08:21:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:12,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:12,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844809995] [2021-05-06 08:21:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:21:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:21:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:12,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:12,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:12,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610118620] [2021-05-06 08:21:12,871 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:12,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844809995] [2021-05-06 08:21:12,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844809995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:12,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:12,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:21:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879806320] [2021-05-06 08:21:12,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:12,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:12,873 INFO L87 Difference]: Start difference. First operand 542 states and 730 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:12,979 INFO L93 Difference]: Finished difference Result 544 states and 727 transitions. [2021-05-06 08:21:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-06 08:21:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:12,982 INFO L225 Difference]: With dead ends: 544 [2021-05-06 08:21:12,982 INFO L226 Difference]: Without dead ends: 544 [2021-05-06 08:21:12,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-06 08:21:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2021-05-06 08:21:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.272972972972973) internal successors, (471), 383 states have internal predecessors, (471), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:21:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-05-06 08:21:12,997 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 65 [2021-05-06 08:21:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:12,997 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-05-06 08:21:12,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-05-06 08:21:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:21:12,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:12,999 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:13,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:21:13,213 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-06 08:21:13,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:13,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134307136] [2021-05-06 08:21:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:13,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:13,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771265641] [2021-05-06 08:21:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order 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 08:21:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:21:13,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:13,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 08:21:13,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:13,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134307136] [2021-05-06 08:21:13,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:13,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771265641] [2021-05-06 08:21:13,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771265641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:13,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:13,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352485680] [2021-05-06 08:21:13,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:13,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:13,432 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:13,485 INFO L93 Difference]: Finished difference Result 588 states and 787 transitions. [2021-05-06 08:21:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-06 08:21:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:13,488 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:21:13,488 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:21:13,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:21:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 532. [2021-05-06 08:21:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 376 states have (on average 1.2845744680851063) internal successors, (483), 382 states have internal predecessors, (483), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 08:21:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 714 transitions. [2021-05-06 08:21:13,503 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 714 transitions. Word has length 69 [2021-05-06 08:21:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:13,504 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 714 transitions. [2021-05-06 08:21:13,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 714 transitions. [2021-05-06 08:21:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:21:13,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:13,505 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:13,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:13,729 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-06 08:21:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:13,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164016664] [2021-05-06 08:21:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:13,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:13,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114197017] [2021-05-06 08:21:13,735 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 08:21:13,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:13,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:21:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:13,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:13,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:13,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164016664] [2021-05-06 08:21:13,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:13,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114197017] [2021-05-06 08:21:13,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114197017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:13,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:13,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:13,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209496872] [2021-05-06 08:21:13,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:13,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:13,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:13,958 INFO L87 Difference]: Start difference. First operand 532 states and 714 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:14,112 INFO L93 Difference]: Finished difference Result 555 states and 735 transitions. [2021-05-06 08:21:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:14,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-06 08:21:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:14,115 INFO L225 Difference]: With dead ends: 555 [2021-05-06 08:21:14,115 INFO L226 Difference]: Without dead ends: 555 [2021-05-06 08:21:14,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-06 08:21:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2021-05-06 08:21:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 386 states have (on average 1.2772020725388602) internal successors, (493), 389 states have internal predecessors, (493), 118 states have call successors, (118), 40 states have call predecessors, (118), 39 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:21:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 726 transitions. [2021-05-06 08:21:14,130 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 726 transitions. Word has length 69 [2021-05-06 08:21:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:14,130 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 726 transitions. [2021-05-06 08:21:14,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 726 transitions. [2021-05-06 08:21:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:21:14,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:14,131 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:14,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:21:14,345 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-06 08:21:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:14,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627469350] [2021-05-06 08:21:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:14,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:14,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121791680] [2021-05-06 08:21:14,351 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:14,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:14,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:21:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:14,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:14,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627469350] [2021-05-06 08:21:14,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121791680] [2021-05-06 08:21:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121791680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:14,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:14,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:14,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217549327] [2021-05-06 08:21:14,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:14,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:14,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:14,570 INFO L87 Difference]: Start difference. First operand 544 states and 726 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:14,737 INFO L93 Difference]: Finished difference Result 664 states and 855 transitions. [2021-05-06 08:21:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:21:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-06 08:21:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:14,740 INFO L225 Difference]: With dead ends: 664 [2021-05-06 08:21:14,740 INFO L226 Difference]: Without dead ends: 664 [2021-05-06 08:21:14,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-05-06 08:21:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 631. [2021-05-06 08:21:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 444 states have (on average 1.2545045045045045) internal successors, (557), 448 states have internal predecessors, (557), 135 states have call successors, (135), 52 states have call predecessors, (135), 51 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-06 08:21:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 823 transitions. [2021-05-06 08:21:14,757 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 823 transitions. Word has length 70 [2021-05-06 08:21:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:14,757 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 823 transitions. [2021-05-06 08:21:14,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 823 transitions. [2021-05-06 08:21:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:21:14,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:14,758 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:14,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:21:14,973 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-06 08:21:14,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:14,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519916166] [2021-05-06 08:21:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:14,980 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:14,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792475687] [2021-05-06 08:21:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:21:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:21:15,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:15,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519916166] [2021-05-06 08:21:15,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:15,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792475687] [2021-05-06 08:21:15,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792475687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:15,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:15,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:15,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131562357] [2021-05-06 08:21:15,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:15,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:15,184 INFO L87 Difference]: Start difference. First operand 631 states and 823 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:15,280 INFO L93 Difference]: Finished difference Result 722 states and 953 transitions. [2021-05-06 08:21:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-05-06 08:21:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:15,283 INFO L225 Difference]: With dead ends: 722 [2021-05-06 08:21:15,283 INFO L226 Difference]: Without dead ends: 722 [2021-05-06 08:21:15,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-06 08:21:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 715. [2021-05-06 08:21:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 519 states have (on average 1.2793834296724471) internal successors, (664), 528 states have internal predecessors, (664), 143 states have call successors, (143), 53 states have call predecessors, (143), 52 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:21:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 946 transitions. [2021-05-06 08:21:15,300 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 946 transitions. Word has length 70 [2021-05-06 08:21:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:15,300 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 946 transitions. [2021-05-06 08:21:15,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 946 transitions. [2021-05-06 08:21:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:21:15,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:15,302 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:15,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:21:15,525 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-06 08:21:15,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:15,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986973211] [2021-05-06 08:21:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:15,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:15,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74745449] [2021-05-06 08:21:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:21:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:15,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:21:15,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:15,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986973211] [2021-05-06 08:21:15,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:15,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74745449] [2021-05-06 08:21:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74745449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:15,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:15,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:15,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675859040] [2021-05-06 08:21:15,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:15,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:15,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:15,793 INFO L87 Difference]: Start difference. First operand 715 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 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 08:21:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:16,220 INFO L93 Difference]: Finished difference Result 942 states and 1295 transitions. [2021-05-06 08:21:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:21:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 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 74 [2021-05-06 08:21:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:16,224 INFO L225 Difference]: With dead ends: 942 [2021-05-06 08:21:16,224 INFO L226 Difference]: Without dead ends: 942 [2021-05-06 08:21:16,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:21:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-06 08:21:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 745. [2021-05-06 08:21:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 534 states have (on average 1.2771535580524345) internal successors, (682), 546 states have internal predecessors, (682), 155 states have call successors, (155), 56 states have call predecessors, (155), 55 states have return successors, (151), 142 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-06 08:21:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 988 transitions. [2021-05-06 08:21:16,247 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 988 transitions. Word has length 74 [2021-05-06 08:21:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:16,247 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 988 transitions. [2021-05-06 08:21:16,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 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 08:21:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 988 transitions. [2021-05-06 08:21:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:21:16,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:16,248 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:16,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:21:16,465 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-06 08:21:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:16,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067990128] [2021-05-06 08:21:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:16,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:16,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928056067] [2021-05-06 08:21:16,473 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:21:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:21:16,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067990128] [2021-05-06 08:21:16,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928056067] [2021-05-06 08:21:16,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928056067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:16,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:16,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052636001] [2021-05-06 08:21:16,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:16,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:16,687 INFO L87 Difference]: Start difference. First operand 745 states and 988 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 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 08:21:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:16,863 INFO L93 Difference]: Finished difference Result 913 states and 1248 transitions. [2021-05-06 08:21:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 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 73 [2021-05-06 08:21:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:16,867 INFO L225 Difference]: With dead ends: 913 [2021-05-06 08:21:16,867 INFO L226 Difference]: Without dead ends: 913 [2021-05-06 08:21:16,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-05-06 08:21:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 838. [2021-05-06 08:21:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 600 states have (on average 1.3033333333333332) internal successors, (782), 613 states have internal predecessors, (782), 180 states have call successors, (180), 58 states have call predecessors, (180), 57 states have return successors, (176), 166 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-06 08:21:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1138 transitions. [2021-05-06 08:21:16,894 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1138 transitions. Word has length 73 [2021-05-06 08:21:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:16,896 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1138 transitions. [2021-05-06 08:21:16,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 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 08:21:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1138 transitions. [2021-05-06 08:21:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:21:16,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:16,897 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:17,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:17,113 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-06 08:21:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:17,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108544468] [2021-05-06 08:21:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:17,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:17,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000147790] [2021-05-06 08:21:17,119 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:17,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:21:17,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:17,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:21:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:17,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 08:21:17,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:17,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108544468] [2021-05-06 08:21:17,505 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:17,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000147790] [2021-05-06 08:21:17,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000147790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:17,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:17,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:17,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096278857] [2021-05-06 08:21:17,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:17,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:17,506 INFO L87 Difference]: Start difference. First operand 838 states and 1138 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:21:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:17,913 INFO L93 Difference]: Finished difference Result 920 states and 1253 transitions. [2021-05-06 08:21:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-05-06 08:21:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:17,917 INFO L225 Difference]: With dead ends: 920 [2021-05-06 08:21:17,917 INFO L226 Difference]: Without dead ends: 920 [2021-05-06 08:21:17,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-06 08:21:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 895. [2021-05-06 08:21:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 636 states have (on average 1.309748427672956) internal successors, (833), 650 states have internal predecessors, (833), 198 states have call successors, (198), 61 states have call predecessors, (198), 60 states have return successors, (194), 183 states have call predecessors, (194), 194 states have call successors, (194) [2021-05-06 08:21:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1225 transitions. [2021-05-06 08:21:17,940 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1225 transitions. Word has length 75 [2021-05-06 08:21:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:17,941 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1225 transitions. [2021-05-06 08:21:17,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:21:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1225 transitions. [2021-05-06 08:21:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 08:21:17,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:17,942 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:18,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:18,157 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-06 08:21:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:18,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70267045] [2021-05-06 08:21:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:18,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:18,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165269267] [2021-05-06 08:21:18,167 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:18,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:18,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:18,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:18,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:18,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70267045] [2021-05-06 08:21:18,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165269267] [2021-05-06 08:21:18,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165269267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:18,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:18,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:18,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114083] [2021-05-06 08:21:18,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:18,428 INFO L87 Difference]: Start difference. First operand 895 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:18,633 INFO L93 Difference]: Finished difference Result 1075 states and 1426 transitions. [2021-05-06 08:21:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-06 08:21:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:18,637 INFO L225 Difference]: With dead ends: 1075 [2021-05-06 08:21:18,637 INFO L226 Difference]: Without dead ends: 1075 [2021-05-06 08:21:18,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-06 08:21:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1045. [2021-05-06 08:21:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 740 states have (on average 1.2797297297297296) internal successors, (947), 755 states have internal predecessors, (947), 229 states have call successors, (229), 76 states have call predecessors, (229), 75 states have return successors, (224), 213 states have call predecessors, (224), 224 states have call successors, (224) [2021-05-06 08:21:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1400 transitions. [2021-05-06 08:21:18,673 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1400 transitions. Word has length 76 [2021-05-06 08:21:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:18,673 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 1400 transitions. [2021-05-06 08:21:18,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1400 transitions. [2021-05-06 08:21:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:21:18,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:18,674 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:18,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:18,893 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-06 08:21:18,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:18,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006488181] [2021-05-06 08:21:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:18,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:18,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326259521] [2021-05-06 08:21:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 08:21:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:19,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:21:19,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:19,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006488181] [2021-05-06 08:21:19,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:19,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326259521] [2021-05-06 08:21:19,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326259521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:19,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:19,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:19,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786006326] [2021-05-06 08:21:19,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:19,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:19,268 INFO L87 Difference]: Start difference. First operand 1045 states and 1400 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:19,759 INFO L93 Difference]: Finished difference Result 1119 states and 1497 transitions. [2021-05-06 08:21:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-05-06 08:21:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:19,765 INFO L225 Difference]: With dead ends: 1119 [2021-05-06 08:21:19,765 INFO L226 Difference]: Without dead ends: 1118 [2021-05-06 08:21:19,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-05-06 08:21:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1053. [2021-05-06 08:21:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2757697456492638) internal successors, (953), 761 states have internal predecessors, (953), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:21:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1403 transitions. [2021-05-06 08:21:19,790 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1403 transitions. Word has length 81 [2021-05-06 08:21:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:19,790 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1403 transitions. [2021-05-06 08:21:19,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1403 transitions. [2021-05-06 08:21:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:21:19,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:19,791 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:20,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 08:21:20,005 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-06 08:21:20,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:20,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144055607] [2021-05-06 08:21:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:20,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:20,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937450471] [2021-05-06 08:21:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:21:20,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:20,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:20,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:20,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144055607] [2021-05-06 08:21:20,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:20,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937450471] [2021-05-06 08:21:20,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937450471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:20,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:20,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:20,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286341439] [2021-05-06 08:21:20,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:20,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:20,288 INFO L87 Difference]: Start difference. First operand 1053 states and 1403 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:20,468 INFO L93 Difference]: Finished difference Result 1059 states and 1404 transitions. [2021-05-06 08:21:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:21:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-06 08:21:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:20,472 INFO L225 Difference]: With dead ends: 1059 [2021-05-06 08:21:20,472 INFO L226 Difference]: Without dead ends: 1059 [2021-05-06 08:21:20,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-05-06 08:21:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2021-05-06 08:21:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2730923694779117) internal successors, (951), 761 states have internal predecessors, (951), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:21:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1401 transitions. [2021-05-06 08:21:20,495 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1401 transitions. Word has length 87 [2021-05-06 08:21:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:20,495 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1401 transitions. [2021-05-06 08:21:20,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1401 transitions. [2021-05-06 08:21:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:21:20,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:20,497 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:20,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:20,711 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-06 08:21:20,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:20,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963997268] [2021-05-06 08:21:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:20,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:20,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733065301] [2021-05-06 08:21:20,717 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:20,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:21:20,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:20,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:21:20,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:20,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963997268] [2021-05-06 08:21:20,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:20,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733065301] [2021-05-06 08:21:20,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733065301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:20,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:20,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:21:20,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909343964] [2021-05-06 08:21:20,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:21:20,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:21:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:20,966 INFO L87 Difference]: Start difference. First operand 1053 states and 1401 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:21:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:21,105 INFO L93 Difference]: Finished difference Result 1318 states and 1830 transitions. [2021-05-06 08:21:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:21:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-06 08:21:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:21,110 INFO L225 Difference]: With dead ends: 1318 [2021-05-06 08:21:21,110 INFO L226 Difference]: Without dead ends: 1318 [2021-05-06 08:21:21,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-06 08:21:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-05-06 08:21:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 808 states have (on average 1.2896039603960396) internal successors, (1042), 830 states have internal predecessors, (1042), 308 states have call successors, (308), 82 states have call predecessors, (308), 81 states have return successors, (304), 285 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-06 08:21:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1654 transitions. [2021-05-06 08:21:21,142 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1654 transitions. Word has length 90 [2021-05-06 08:21:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:21,142 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 1654 transitions. [2021-05-06 08:21:21,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:21:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1654 transitions. [2021-05-06 08:21:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 08:21:21,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:21,143 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:21,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:21:21,368 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-06 08:21:21,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:21,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359150410] [2021-05-06 08:21:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:21,374 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:21,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086461911] [2021-05-06 08:21:21,374 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:21,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 08:21:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:21,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 08:21:21,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:21,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359150410] [2021-05-06 08:21:21,943 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:21,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086461911] [2021-05-06 08:21:21,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086461911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:21,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:21,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:21:21,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27131190] [2021-05-06 08:21:21,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:21:21,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:21:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:21,944 INFO L87 Difference]: Start difference. First operand 1198 states and 1654 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:22,785 INFO L93 Difference]: Finished difference Result 1344 states and 1878 transitions. [2021-05-06 08:21:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:21:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-05-06 08:21:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:22,791 INFO L225 Difference]: With dead ends: 1344 [2021-05-06 08:21:22,791 INFO L226 Difference]: Without dead ends: 1343 [2021-05-06 08:21:22,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:21:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-05-06 08:21:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1301. [2021-05-06 08:21:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 862 states have (on average 1.3004640371229699) internal successors, (1121), 888 states have internal predecessors, (1121), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:21:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1825 transitions. [2021-05-06 08:21:22,819 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1825 transitions. Word has length 88 [2021-05-06 08:21:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:22,821 INFO L480 AbstractCegarLoop]: Abstraction has 1301 states and 1825 transitions. [2021-05-06 08:21:22,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1825 transitions. [2021-05-06 08:21:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:21:22,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:22,822 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:23,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:23,046 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-06 08:21:23,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:23,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908253858] [2021-05-06 08:21:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:23,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:23,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752546438] [2021-05-06 08:21:23,051 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:23,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:23,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:23,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908253858] [2021-05-06 08:21:23,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752546438] [2021-05-06 08:21:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752546438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:23,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:23,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919927275] [2021-05-06 08:21:23,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:23,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:23,320 INFO L87 Difference]: Start difference. First operand 1301 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:23,493 INFO L93 Difference]: Finished difference Result 1331 states and 1852 transitions. [2021-05-06 08:21:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-06 08:21:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:23,499 INFO L225 Difference]: With dead ends: 1331 [2021-05-06 08:21:23,499 INFO L226 Difference]: Without dead ends: 1331 [2021-05-06 08:21:23,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-05-06 08:21:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1312. [2021-05-06 08:21:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 873 states have (on average 1.2966781214203895) internal successors, (1132), 899 states have internal predecessors, (1132), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:21:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1836 transitions. [2021-05-06 08:21:23,525 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1836 transitions. Word has length 91 [2021-05-06 08:21:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:23,526 INFO L480 AbstractCegarLoop]: Abstraction has 1312 states and 1836 transitions. [2021-05-06 08:21:23,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1836 transitions. [2021-05-06 08:21:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:21:23,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:23,527 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:23,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:21:23,749 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-06 08:21:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:23,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882483518] [2021-05-06 08:21:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:23,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:23,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605886643] [2021-05-06 08:21:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:23,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:23,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:24,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:24,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882483518] [2021-05-06 08:21:24,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:24,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605886643] [2021-05-06 08:21:24,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605886643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:24,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:24,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:24,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399889549] [2021-05-06 08:21:24,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:24,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:24,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:24,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:24,023 INFO L87 Difference]: Start difference. First operand 1312 states and 1836 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:24,210 INFO L93 Difference]: Finished difference Result 1338 states and 1858 transitions. [2021-05-06 08:21:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-06 08:21:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:24,216 INFO L225 Difference]: With dead ends: 1338 [2021-05-06 08:21:24,216 INFO L226 Difference]: Without dead ends: 1338 [2021-05-06 08:21:24,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-06 08:21:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1332. [2021-05-06 08:21:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 893 states have (on average 1.2889137737961927) internal successors, (1151), 919 states have internal predecessors, (1151), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:21:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1855 transitions. [2021-05-06 08:21:24,239 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1855 transitions. Word has length 93 [2021-05-06 08:21:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:24,240 INFO L480 AbstractCegarLoop]: Abstraction has 1332 states and 1855 transitions. [2021-05-06 08:21:24,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1855 transitions. [2021-05-06 08:21:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:21:24,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:24,241 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:24,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:21:24,457 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-06 08:21:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:24,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766374413] [2021-05-06 08:21:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:24,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:24,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409793065] [2021-05-06 08:21:24,474 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:24,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:24,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:21:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:24,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:24,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766374413] [2021-05-06 08:21:24,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409793065] [2021-05-06 08:21:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409793065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:24,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:24,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:24,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233490004] [2021-05-06 08:21:24,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:24,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:24,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:24,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:24,766 INFO L87 Difference]: Start difference. First operand 1332 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:24,969 INFO L93 Difference]: Finished difference Result 1511 states and 2057 transitions. [2021-05-06 08:21:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:24,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-06 08:21:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:24,982 INFO L225 Difference]: With dead ends: 1511 [2021-05-06 08:21:24,983 INFO L226 Difference]: Without dead ends: 1511 [2021-05-06 08:21:24,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-05-06 08:21:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1454. [2021-05-06 08:21:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 963 states have (on average 1.2793354101765317) internal successors, (1232), 990 states have internal predecessors, (1232), 387 states have call successors, (387), 104 states have call predecessors, (387), 103 states have return successors, (382), 359 states have call predecessors, (382), 382 states have call successors, (382) [2021-05-06 08:21:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2001 transitions. [2021-05-06 08:21:25,014 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2001 transitions. Word has length 97 [2021-05-06 08:21:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:25,014 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 2001 transitions. [2021-05-06 08:21:25,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2001 transitions. [2021-05-06 08:21:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 08:21:25,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:25,017 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:25,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:21:25,231 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-06 08:21:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:25,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128669571] [2021-05-06 08:21:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:25,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:25,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148389503] [2021-05-06 08:21:25,237 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:25,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:25,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:21:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:25,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:25,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128669571] [2021-05-06 08:21:25,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148389503] [2021-05-06 08:21:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148389503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:25,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:25,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:21:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338310255] [2021-05-06 08:21:25,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:21:25,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:21:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:25,571 INFO L87 Difference]: Start difference. First operand 1454 states and 2001 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:25,829 INFO L93 Difference]: Finished difference Result 1737 states and 2340 transitions. [2021-05-06 08:21:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:21:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-06 08:21:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:25,836 INFO L225 Difference]: With dead ends: 1737 [2021-05-06 08:21:25,836 INFO L226 Difference]: Without dead ends: 1737 [2021-05-06 08:21:25,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:21:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-05-06 08:21:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1654. [2021-05-06 08:21:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1097 states have (on average 1.2652689152233363) internal successors, (1388), 1137 states have internal predecessors, (1388), 434 states have call successors, (434), 123 states have call predecessors, (434), 122 states have return successors, (428), 393 states have call predecessors, (428), 428 states have call successors, (428) [2021-05-06 08:21:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2250 transitions. [2021-05-06 08:21:25,865 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2250 transitions. Word has length 98 [2021-05-06 08:21:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:25,866 INFO L480 AbstractCegarLoop]: Abstraction has 1654 states and 2250 transitions. [2021-05-06 08:21:25,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2250 transitions. [2021-05-06 08:21:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:21:25,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:25,868 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:26,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:21:26,091 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 114401441, now seen corresponding path program 1 times [2021-05-06 08:21:26,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:26,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057829146] [2021-05-06 08:21:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:26,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159275416] [2021-05-06 08:21:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:21:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:26,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:26,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057829146] [2021-05-06 08:21:26,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159275416] [2021-05-06 08:21:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159275416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:26,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:26,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:26,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273460561] [2021-05-06 08:21:26,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:26,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:26,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:26,377 INFO L87 Difference]: Start difference. First operand 1654 states and 2250 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:26,611 INFO L93 Difference]: Finished difference Result 1656 states and 2225 transitions. [2021-05-06 08:21:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:26,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-06 08:21:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:26,627 INFO L225 Difference]: With dead ends: 1656 [2021-05-06 08:21:26,628 INFO L226 Difference]: Without dead ends: 1656 [2021-05-06 08:21:26,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-06 08:21:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1631. [2021-05-06 08:21:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1081 states have (on average 1.247918593894542) internal successors, (1349), 1120 states have internal predecessors, (1349), 428 states have call successors, (428), 122 states have call predecessors, (428), 121 states have return successors, (422), 388 states have call predecessors, (422), 422 states have call successors, (422) [2021-05-06 08:21:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2199 transitions. [2021-05-06 08:21:26,657 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2199 transitions. Word has length 99 [2021-05-06 08:21:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:26,657 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 2199 transitions. [2021-05-06 08:21:26,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2199 transitions. [2021-05-06 08:21:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:21:26,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:26,659 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:26,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:26,883 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:26,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1944004338, now seen corresponding path program 3 times [2021-05-06 08:21:26,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:26,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906021881] [2021-05-06 08:21:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:26,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:26,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984780914] [2021-05-06 08:21:26,889 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:26,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:26,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:21:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:27,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 70 proven. 7 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-05-06 08:21:27,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:27,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906021881] [2021-05-06 08:21:27,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:27,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984780914] [2021-05-06 08:21:27,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984780914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:27,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:27,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132860034] [2021-05-06 08:21:27,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:27,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:27,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:27,310 INFO L87 Difference]: Start difference. First operand 1631 states and 2199 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:28,126 INFO L93 Difference]: Finished difference Result 1965 states and 2682 transitions. [2021-05-06 08:21:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:28,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-05-06 08:21:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:28,137 INFO L225 Difference]: With dead ends: 1965 [2021-05-06 08:21:28,137 INFO L226 Difference]: Without dead ends: 1960 [2021-05-06 08:21:28,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-05-06 08:21:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1872. [2021-05-06 08:21:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1231 states have (on average 1.2518277822908204) internal successors, (1541), 1276 states have internal predecessors, (1541), 507 states have call successors, (507), 134 states have call predecessors, (507), 133 states have return successors, (502), 461 states have call predecessors, (502), 502 states have call successors, (502) [2021-05-06 08:21:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2550 transitions. [2021-05-06 08:21:28,177 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2550 transitions. Word has length 104 [2021-05-06 08:21:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:28,177 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 2550 transitions. [2021-05-06 08:21:28,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2550 transitions. [2021-05-06 08:21:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:21:28,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:28,180 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:28,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:21:28,393 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash -840847847, now seen corresponding path program 4 times [2021-05-06 08:21:28,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:28,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360836926] [2021-05-06 08:21:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:28,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:28,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121751014] [2021-05-06 08:21:28,398 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:28,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:28,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:28,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-06 08:21:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:28,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:28,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,590 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 08:21:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:21:29,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:29,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360836926] [2021-05-06 08:21:29,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121751014] [2021-05-06 08:21:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121751014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:29,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:29,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:21:29,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560314273] [2021-05-06 08:21:29,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:21:29,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:21:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:21:29,661 INFO L87 Difference]: Start difference. First operand 1872 states and 2550 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 08:21:30,654 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-06 08:21:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:31,086 INFO L93 Difference]: Finished difference Result 2055 states and 2812 transitions. [2021-05-06 08:21:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:21:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 102 [2021-05-06 08:21:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:31,092 INFO L225 Difference]: With dead ends: 2055 [2021-05-06 08:21:31,093 INFO L226 Difference]: Without dead ends: 2055 [2021-05-06 08:21:31,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1380.3ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:21:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-05-06 08:21:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2031. [2021-05-06 08:21:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1325 states have (on average 1.2588679245283019) internal successors, (1668), 1374 states have internal predecessors, (1668), 561 states have call successors, (561), 145 states have call predecessors, (561), 144 states have return successors, (556), 511 states have call predecessors, (556), 556 states have call successors, (556) [2021-05-06 08:21:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2785 transitions. [2021-05-06 08:21:31,128 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2785 transitions. Word has length 102 [2021-05-06 08:21:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:31,128 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 2785 transitions. [2021-05-06 08:21:31,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 08:21:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2785 transitions. [2021-05-06 08:21:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 08:21:31,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:31,130 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:31,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:31,345 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1448058698, now seen corresponding path program 4 times [2021-05-06 08:21:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:31,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057186964] [2021-05-06 08:21:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:31,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:31,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194600397] [2021-05-06 08:21:31,351 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:31,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:31,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:21:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:31,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:31,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:31,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057186964] [2021-05-06 08:21:31,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194600397] [2021-05-06 08:21:31,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194600397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:31,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:31,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:21:31,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682622975] [2021-05-06 08:21:31,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:21:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:21:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:31,680 INFO L87 Difference]: Start difference. First operand 2031 states and 2785 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:31,973 INFO L93 Difference]: Finished difference Result 2143 states and 2902 transitions. [2021-05-06 08:21:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:21:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-05-06 08:21:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:31,979 INFO L225 Difference]: With dead ends: 2143 [2021-05-06 08:21:31,979 INFO L226 Difference]: Without dead ends: 2143 [2021-05-06 08:21:31,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:21:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-05-06 08:21:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2098. [2021-05-06 08:21:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1388 states have (on average 1.2528818443804035) internal successors, (1739), 1420 states have internal predecessors, (1739), 563 states have call successors, (563), 147 states have call predecessors, (563), 146 states have return successors, (558), 530 states have call predecessors, (558), 558 states have call successors, (558) [2021-05-06 08:21:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2860 transitions. [2021-05-06 08:21:32,035 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2860 transitions. Word has length 103 [2021-05-06 08:21:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:32,036 INFO L480 AbstractCegarLoop]: Abstraction has 2098 states and 2860 transitions. [2021-05-06 08:21:32,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2860 transitions. [2021-05-06 08:21:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:21:32,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:32,038 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:32,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:32,249 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash 816301515, now seen corresponding path program 4 times [2021-05-06 08:21:32,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:32,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89727673] [2021-05-06 08:21:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:32,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:32,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881539882] [2021-05-06 08:21:32,255 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:32,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:32,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:21:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:32,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:32,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89727673] [2021-05-06 08:21:32,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881539882] [2021-05-06 08:21:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881539882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:32,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:32,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:32,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831611483] [2021-05-06 08:21:32,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:32,617 INFO L87 Difference]: Start difference. First operand 2098 states and 2860 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:32,975 INFO L93 Difference]: Finished difference Result 2506 states and 3367 transitions. [2021-05-06 08:21:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:21:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-06 08:21:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:32,985 INFO L225 Difference]: With dead ends: 2506 [2021-05-06 08:21:32,985 INFO L226 Difference]: Without dead ends: 2506 [2021-05-06 08:21:32,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:21:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-05-06 08:21:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2373. [2021-05-06 08:21:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 1538 states have (on average 1.2451235370611184) internal successors, (1915), 1571 states have internal predecessors, (1915), 660 states have call successors, (660), 175 states have call predecessors, (660), 174 states have return successors, (654), 626 states have call predecessors, (654), 654 states have call successors, (654) [2021-05-06 08:21:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3229 transitions. [2021-05-06 08:21:33,033 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3229 transitions. Word has length 104 [2021-05-06 08:21:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:33,033 INFO L480 AbstractCegarLoop]: Abstraction has 2373 states and 3229 transitions. [2021-05-06 08:21:33,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3229 transitions. [2021-05-06 08:21:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:21:33,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:33,036 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:33,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:21:33,258 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:33,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 4 times [2021-05-06 08:21:33,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:33,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512373651] [2021-05-06 08:21:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:33,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:33,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594400838] [2021-05-06 08:21:33,264 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:33,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:21:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:33,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 72 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 08:21:33,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512373651] [2021-05-06 08:21:33,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594400838] [2021-05-06 08:21:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594400838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:33,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:33,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:21:33,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454215353] [2021-05-06 08:21:33,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:21:33,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:21:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:21:33,978 INFO L87 Difference]: Start difference. First operand 2373 states and 3229 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:34,741 INFO L93 Difference]: Finished difference Result 2361 states and 3206 transitions. [2021-05-06 08:21:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:21:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2021-05-06 08:21:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:34,747 INFO L225 Difference]: With dead ends: 2361 [2021-05-06 08:21:34,747 INFO L226 Difference]: Without dead ends: 2356 [2021-05-06 08:21:34,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-06 08:21:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2345. [2021-05-06 08:21:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1524 states have (on average 1.246719160104987) internal successors, (1900), 1558 states have internal predecessors, (1900), 647 states have call successors, (647), 174 states have call predecessors, (647), 173 states have return successors, (642), 612 states have call predecessors, (642), 642 states have call successors, (642) [2021-05-06 08:21:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3189 transitions. [2021-05-06 08:21:34,818 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3189 transitions. Word has length 108 [2021-05-06 08:21:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:34,818 INFO L480 AbstractCegarLoop]: Abstraction has 2345 states and 3189 transitions. [2021-05-06 08:21:34,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3189 transitions. [2021-05-06 08:21:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:21:34,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:34,821 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:35,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 08:21:35,037 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1065259357, now seen corresponding path program 5 times [2021-05-06 08:21:35,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:35,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277853687] [2021-05-06 08:21:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:35,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755724650] [2021-05-06 08:21:35,043 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:35,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:21:35,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:21:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:35,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:35,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,374 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-06 08:21:36,735 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-06 08:21:36,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:36,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 71 proven. 89 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:21:38,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277853687] [2021-05-06 08:21:38,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755724650] [2021-05-06 08:21:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755724650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:21:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893791475] [2021-05-06 08:21:38,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:21:38,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:21:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:21:38,602 INFO L87 Difference]: Start difference. First operand 2345 states and 3189 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 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 08:21:41,814 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-06 08:21:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:43,855 INFO L93 Difference]: Finished difference Result 2491 states and 3385 transitions. [2021-05-06 08:21:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:43,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 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 111 [2021-05-06 08:21:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:43,868 INFO L225 Difference]: With dead ends: 2491 [2021-05-06 08:21:43,868 INFO L226 Difference]: Without dead ends: 2490 [2021-05-06 08:21:43,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2959.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-06 08:21:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2385. [2021-05-06 08:21:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 1553 states have (on average 1.2421120412105602) internal successors, (1929), 1588 states have internal predecessors, (1929), 649 states have call successors, (649), 183 states have call predecessors, (649), 182 states have return successors, (644), 613 states have call predecessors, (644), 644 states have call successors, (644) [2021-05-06 08:21:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3222 transitions. [2021-05-06 08:21:43,909 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3222 transitions. Word has length 111 [2021-05-06 08:21:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:43,909 INFO L480 AbstractCegarLoop]: Abstraction has 2385 states and 3222 transitions. [2021-05-06 08:21:43,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 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 08:21:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3222 transitions. [2021-05-06 08:21:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 08:21:43,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:43,911 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:44,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:21:44,125 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1419687748, now seen corresponding path program 5 times [2021-05-06 08:21:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:44,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762239883] [2021-05-06 08:21:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:44,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:44,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468751868] [2021-05-06 08:21:44,131 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:44,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:21:44,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:44,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-06 08:21:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:44,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,935 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:21:45,110 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-06 08:21:45,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 32 proven. 92 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-06 08:21:45,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:45,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762239883] [2021-05-06 08:21:45,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:45,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468751868] [2021-05-06 08:21:45,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468751868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:45,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:45,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37612093] [2021-05-06 08:21:45,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:45,295 INFO L87 Difference]: Start difference. First operand 2385 states and 3222 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:21:46,116 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-06 08:21:46,413 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-06 08:21:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:46,685 INFO L93 Difference]: Finished difference Result 2551 states and 3450 transitions. [2021-05-06 08:21:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 109 [2021-05-06 08:21:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:46,691 INFO L225 Difference]: With dead ends: 2551 [2021-05-06 08:21:46,691 INFO L226 Difference]: Without dead ends: 2551 [2021-05-06 08:21:46,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1427.3ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:21:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-06 08:21:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2494. [2021-05-06 08:21:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1621 states have (on average 1.2449105490438002) internal successors, (2018), 1659 states have internal predecessors, (2018), 683 states have call successors, (683), 190 states have call predecessors, (683), 189 states have return successors, (678), 644 states have call predecessors, (678), 678 states have call successors, (678) [2021-05-06 08:21:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3379 transitions. [2021-05-06 08:21:46,733 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3379 transitions. Word has length 109 [2021-05-06 08:21:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:46,734 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 3379 transitions. [2021-05-06 08:21:46,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:21:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3379 transitions. [2021-05-06 08:21:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 08:21:46,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:46,736 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:46,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:46,942 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1489781889, now seen corresponding path program 5 times [2021-05-06 08:21:46,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:46,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383553082] [2021-05-06 08:21:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:46,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:46,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782770745] [2021-05-06 08:21:46,947 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:47,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:21:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:21:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:47,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:47,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:47,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383553082] [2021-05-06 08:21:47,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:47,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782770745] [2021-05-06 08:21:47,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782770745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:47,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:47,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:47,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121620639] [2021-05-06 08:21:47,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:47,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:47,376 INFO L87 Difference]: Start difference. First operand 2494 states and 3379 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:47,776 INFO L93 Difference]: Finished difference Result 3065 states and 4075 transitions. [2021-05-06 08:21:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:21:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2021-05-06 08:21:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:47,783 INFO L225 Difference]: With dead ends: 3065 [2021-05-06 08:21:47,783 INFO L226 Difference]: Without dead ends: 3065 [2021-05-06 08:21:47,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-05-06 08:21:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2949. [2021-05-06 08:21:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 1946 states have (on average 1.2204522096608428) internal successors, (2375), 1984 states have internal predecessors, (2375), 782 states have call successors, (782), 221 states have call predecessors, (782), 220 states have return successors, (776), 743 states have call predecessors, (776), 776 states have call successors, (776) [2021-05-06 08:21:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3933 transitions. [2021-05-06 08:21:47,836 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3933 transitions. Word has length 110 [2021-05-06 08:21:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:47,836 INFO L480 AbstractCegarLoop]: Abstraction has 2949 states and 3933 transitions. [2021-05-06 08:21:47,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3933 transitions. [2021-05-06 08:21:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:21:47,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:47,838 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:48,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-06 08:21:48,053 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 989476300, now seen corresponding path program 6 times [2021-05-06 08:21:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:48,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718085460] [2021-05-06 08:21:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:48,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052544765] [2021-05-06 08:21:48,059 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:48,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 08:21:48,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:48,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 08:21:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:48,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 77 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 08:21:48,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:48,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718085460] [2021-05-06 08:21:48,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:48,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052544765] [2021-05-06 08:21:48,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052544765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:48,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:48,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370452027] [2021-05-06 08:21:48,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:48,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:48,884 INFO L87 Difference]: Start difference. First operand 2949 states and 3933 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:49,622 INFO L93 Difference]: Finished difference Result 3033 states and 4055 transitions. [2021-05-06 08:21:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:21:49,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 115 [2021-05-06 08:21:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:49,629 INFO L225 Difference]: With dead ends: 3033 [2021-05-06 08:21:49,629 INFO L226 Difference]: Without dead ends: 3028 [2021-05-06 08:21:49,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-06 08:21:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3005. [2021-05-06 08:21:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 1977 states have (on average 1.2230652503793626) internal successors, (2418), 2016 states have internal predecessors, (2418), 806 states have call successors, (806), 222 states have call predecessors, (806), 221 states have return successors, (800), 766 states have call predecessors, (800), 800 states have call successors, (800) [2021-05-06 08:21:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4024 transitions. [2021-05-06 08:21:49,680 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4024 transitions. Word has length 115 [2021-05-06 08:21:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:49,680 INFO L480 AbstractCegarLoop]: Abstraction has 3005 states and 4024 transitions. [2021-05-06 08:21:49,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4024 transitions. [2021-05-06 08:21:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:21:49,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:49,682 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:49,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-06 08:21:49,889 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1356735190, now seen corresponding path program 7 times [2021-05-06 08:21:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:49,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084915892] [2021-05-06 08:21:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:49,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:49,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293421848] [2021-05-06 08:21:49,895 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-06 08:21:49,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:50,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:21:50,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084915892] [2021-05-06 08:21:50,584 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293421848] [2021-05-06 08:21:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293421848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:50,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:21:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072625494] [2021-05-06 08:21:50,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:21:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:21:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:21:50,585 INFO L87 Difference]: Start difference. First operand 3005 states and 4024 transitions. Second operand has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:21:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:51,456 INFO L93 Difference]: Finished difference Result 3144 states and 4209 transitions. [2021-05-06 08:21:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2021-05-06 08:21:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:51,464 INFO L225 Difference]: With dead ends: 3144 [2021-05-06 08:21:51,464 INFO L226 Difference]: Without dead ends: 3143 [2021-05-06 08:21:51,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:21:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-05-06 08:21:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 3059. [2021-05-06 08:21:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 2016 states have (on average 1.2197420634920635) internal successors, (2459), 2056 states have internal predecessors, (2459), 812 states have call successors, (812), 231 states have call predecessors, (812), 230 states have return successors, (806), 771 states have call predecessors, (806), 806 states have call successors, (806) [2021-05-06 08:21:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4077 transitions. [2021-05-06 08:21:51,518 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4077 transitions. Word has length 115 [2021-05-06 08:21:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:51,518 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 4077 transitions. [2021-05-06 08:21:51,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:21:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4077 transitions. [2021-05-06 08:21:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 08:21:51,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:51,520 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:51,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:51,742 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:51,743 INFO L82 PathProgramCache]: Analyzing trace with hash 660396276, now seen corresponding path program 2 times [2021-05-06 08:21:51,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:51,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142835186] [2021-05-06 08:21:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:51,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:51,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840894324] [2021-05-06 08:21:51,749 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:51,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:51,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:51,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:21:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:51,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-05-06 08:21:52,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:52,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142835186] [2021-05-06 08:21:52,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:52,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840894324] [2021-05-06 08:21:52,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840894324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:52,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:52,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:21:52,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418127138] [2021-05-06 08:21:52,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:21:52,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:21:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:52,159 INFO L87 Difference]: Start difference. First operand 3059 states and 4077 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:21:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:52,929 INFO L93 Difference]: Finished difference Result 3571 states and 4894 transitions. [2021-05-06 08:21:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 08:21:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 120 [2021-05-06 08:21:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:52,938 INFO L225 Difference]: With dead ends: 3571 [2021-05-06 08:21:52,938 INFO L226 Difference]: Without dead ends: 3571 [2021-05-06 08:21:52,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 08:21:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2021-05-06 08:21:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3100. [2021-05-06 08:21:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.219607843137255) internal successors, (2488), 2080 states have internal predecessors, (2488), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 08:21:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4130 transitions. [2021-05-06 08:21:52,994 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4130 transitions. Word has length 120 [2021-05-06 08:21:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:52,995 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4130 transitions. [2021-05-06 08:21:52,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:21:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4130 transitions. [2021-05-06 08:21:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 08:21:52,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:52,997 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:53,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-06 08:21:53,213 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -347512269, now seen corresponding path program 2 times [2021-05-06 08:21:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393231093] [2021-05-06 08:21:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:53,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:53,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976320245] [2021-05-06 08:21:53,218 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:53,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:53,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:21:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:53,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:21:53,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:53,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393231093] [2021-05-06 08:21:53,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:53,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976320245] [2021-05-06 08:21:53,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976320245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:53,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:53,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:53,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89594565] [2021-05-06 08:21:53,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:53,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:53,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:53,560 INFO L87 Difference]: Start difference. First operand 3100 states and 4130 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:53,903 INFO L93 Difference]: Finished difference Result 3106 states and 4128 transitions. [2021-05-06 08:21:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:21:53,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2021-05-06 08:21:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:53,909 INFO L225 Difference]: With dead ends: 3106 [2021-05-06 08:21:53,909 INFO L226 Difference]: Without dead ends: 3106 [2021-05-06 08:21:53,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:21:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-05-06 08:21:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 3100. [2021-05-06 08:21:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.217156862745098) internal successors, (2483), 2080 states have internal predecessors, (2483), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 08:21:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4125 transitions. [2021-05-06 08:21:53,965 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4125 transitions. Word has length 121 [2021-05-06 08:21:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:53,966 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4125 transitions. [2021-05-06 08:21:53,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4125 transitions. [2021-05-06 08:21:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:21:53,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:53,968 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:54,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:54,183 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2145145311, now seen corresponding path program 8 times [2021-05-06 08:21:54,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:54,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111893564] [2021-05-06 08:21:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:54,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:54,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328074359] [2021-05-06 08:21:54,190 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:54,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:54,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 08:21:54,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:54,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 08:21:54,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:54,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111893564] [2021-05-06 08:21:54,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:54,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328074359] [2021-05-06 08:21:54,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328074359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:54,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:54,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449707966] [2021-05-06 08:21:54,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:54,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:54,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:54,825 INFO L87 Difference]: Start difference. First operand 3100 states and 4125 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:55,930 INFO L93 Difference]: Finished difference Result 3260 states and 4355 transitions. [2021-05-06 08:21:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 122 [2021-05-06 08:21:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:55,935 INFO L225 Difference]: With dead ends: 3260 [2021-05-06 08:21:55,935 INFO L226 Difference]: Without dead ends: 3259 [2021-05-06 08:21:55,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:21:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-05-06 08:21:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 3223. [2021-05-06 08:21:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2110 states have (on average 1.2222748815165876) internal successors, (2579), 2154 states have internal predecessors, (2579), 870 states have call successors, (870), 243 states have call predecessors, (870), 242 states have return successors, (864), 825 states have call predecessors, (864), 864 states have call successors, (864) [2021-05-06 08:21:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4313 transitions. [2021-05-06 08:21:55,989 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4313 transitions. Word has length 122 [2021-05-06 08:21:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:55,989 INFO L480 AbstractCegarLoop]: Abstraction has 3223 states and 4313 transitions. [2021-05-06 08:21:55,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4313 transitions. [2021-05-06 08:21:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 08:21:55,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:55,992 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:56,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-05-06 08:21:56,213 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash -510906365, now seen corresponding path program 1 times [2021-05-06 08:21:56,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:56,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361955025] [2021-05-06 08:21:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:56,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:56,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958528329] [2021-05-06 08:21:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 08:21:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 96 proven. 124 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 08:21:56,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361955025] [2021-05-06 08:21:56,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958528329] [2021-05-06 08:21:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958528329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:56,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:56,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614160344] [2021-05-06 08:21:56,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:56,912 INFO L87 Difference]: Start difference. First operand 3223 states and 4313 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:21:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:57,795 INFO L93 Difference]: Finished difference Result 3395 states and 4557 transitions. [2021-05-06 08:21:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 125 [2021-05-06 08:21:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:57,800 INFO L225 Difference]: With dead ends: 3395 [2021-05-06 08:21:57,800 INFO L226 Difference]: Without dead ends: 3395 [2021-05-06 08:21:57,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 576.7ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:21:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-06 08:21:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3290. [2021-05-06 08:21:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 2150 states have (on average 1.2241860465116279) internal successors, (2632), 2194 states have internal predecessors, (2632), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:21:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4406 transitions. [2021-05-06 08:21:57,853 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4406 transitions. Word has length 125 [2021-05-06 08:21:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:57,854 INFO L480 AbstractCegarLoop]: Abstraction has 3290 states and 4406 transitions. [2021-05-06 08:21:57,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:21:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4406 transitions. [2021-05-06 08:21:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 08:21:57,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:57,856 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:58,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-06 08:21:58,080 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2946020, now seen corresponding path program 4 times [2021-05-06 08:21:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:58,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529456247] [2021-05-06 08:21:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:58,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:58,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606551395] [2021-05-06 08:21:58,086 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:58,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:58,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:21:58,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:21:58,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:58,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529456247] [2021-05-06 08:21:58,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:58,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606551395] [2021-05-06 08:21:58,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606551395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:58,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:58,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:58,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572899702] [2021-05-06 08:21:58,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:58,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:58,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:58,472 INFO L87 Difference]: Start difference. First operand 3290 states and 4406 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:58,888 INFO L93 Difference]: Finished difference Result 3354 states and 4466 transitions. [2021-05-06 08:21:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:21:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2021-05-06 08:21:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:58,892 INFO L225 Difference]: With dead ends: 3354 [2021-05-06 08:21:58,892 INFO L226 Difference]: Without dead ends: 3354 [2021-05-06 08:21:58,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-05-06 08:21:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3299. [2021-05-06 08:21:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2159 states have (on average 1.22325150532654) internal successors, (2641), 2203 states have internal predecessors, (2641), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:21:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4415 transitions. [2021-05-06 08:21:58,938 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4415 transitions. Word has length 125 [2021-05-06 08:21:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:58,938 INFO L480 AbstractCegarLoop]: Abstraction has 3299 states and 4415 transitions. [2021-05-06 08:21:58,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4415 transitions. [2021-05-06 08:21:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:21:58,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:58,941 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:59,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-06 08:21:59,157 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1377829051, now seen corresponding path program 2 times [2021-05-06 08:21:59,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:59,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035703786] [2021-05-06 08:21:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:59,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:59,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358296782] [2021-05-06 08:21:59,163 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:59,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:21:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:59,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:21:59,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035703786] [2021-05-06 08:21:59,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358296782] [2021-05-06 08:21:59,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358296782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:59,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:59,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022599374] [2021-05-06 08:21:59,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:59,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:59,504 INFO L87 Difference]: Start difference. First operand 3299 states and 4415 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:59,837 INFO L93 Difference]: Finished difference Result 3374 states and 4485 transitions. [2021-05-06 08:21:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:21:59,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2021-05-06 08:21:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:59,842 INFO L225 Difference]: With dead ends: 3374 [2021-05-06 08:21:59,842 INFO L226 Difference]: Without dead ends: 3374 [2021-05-06 08:21:59,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-05-06 08:21:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3354. [2021-05-06 08:21:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 2214 states have (on average 1.2168021680216803) internal successors, (2694), 2258 states have internal predecessors, (2694), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:21:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4468 transitions. [2021-05-06 08:21:59,896 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4468 transitions. Word has length 127 [2021-05-06 08:21:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:59,896 INFO L480 AbstractCegarLoop]: Abstraction has 3354 states and 4468 transitions. [2021-05-06 08:21:59,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4468 transitions. [2021-05-06 08:21:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 08:21:59,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:59,899 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:00,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-06 08:22:00,123 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash 95675211, now seen corresponding path program 9 times [2021-05-06 08:22:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:00,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331557314] [2021-05-06 08:22:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:00,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338648511] [2021-05-06 08:22:00,129 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:00,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:22:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-06 08:22:00,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:00,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,129 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-06 08:22:01,375 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-06 08:22:01,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 119 proven. 45 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-05-06 08:22:01,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:01,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331557314] [2021-05-06 08:22:01,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:01,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338648511] [2021-05-06 08:22:01,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338648511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:01,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:01,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891472919] [2021-05-06 08:22:01,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:01,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:01,482 INFO L87 Difference]: Start difference. First operand 3354 states and 4468 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:22:04,390 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-05-06 08:22:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:16,482 INFO L93 Difference]: Finished difference Result 3650 states and 4867 transitions. [2021-05-06 08:22:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 131 [2021-05-06 08:22:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:16,491 INFO L225 Difference]: With dead ends: 3650 [2021-05-06 08:22:16,491 INFO L226 Difference]: Without dead ends: 3629 [2021-05-06 08:22:16,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2817.3ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:22:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-05-06 08:22:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3589. [2021-05-06 08:22:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 2368 states have (on average 1.2204391891891893) internal successors, (2890), 2416 states have internal predecessors, (2890), 959 states have call successors, (959), 262 states have call predecessors, (959), 261 states have return successors, (954), 910 states have call predecessors, (954), 954 states have call successors, (954) [2021-05-06 08:22:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 4803 transitions. [2021-05-06 08:22:16,558 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 4803 transitions. Word has length 131 [2021-05-06 08:22:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:16,558 INFO L480 AbstractCegarLoop]: Abstraction has 3589 states and 4803 transitions. [2021-05-06 08:22:16,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:22:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 4803 transitions. [2021-05-06 08:22:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 08:22:16,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:16,561 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:16,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:16,777 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:16,777 INFO L82 PathProgramCache]: Analyzing trace with hash -767499375, now seen corresponding path program 10 times [2021-05-06 08:22:16,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:16,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250666968] [2021-05-06 08:22:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:16,782 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:16,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928579688] [2021-05-06 08:22:16,782 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:16,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:22:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:17,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,327 WARN L159 QuantifierPusher]: Ignoring assumption.