/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:39,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:39,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:39,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:22:39,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:39,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:39,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:39,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:39,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:39,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:39,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:39,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:39,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:39,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:39,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:39,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:39,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:39,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:39,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:39,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:39,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:39,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:39,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:39,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:39,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:39,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:39,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:39,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:39,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:39,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:39,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:39,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:39,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:39,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:39,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:39,272 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:39,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:39,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:39,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:39,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:39,560 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:39,560 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:39,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-06 08:22:39,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980efc127/f6b21490acdb4b2b804c23145c301802/FLAG3daa761a9 [2021-05-06 08:22:40,015 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:40,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-06 08:22:40,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980efc127/f6b21490acdb4b2b804c23145c301802/FLAG3daa761a9 [2021-05-06 08:22:40,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980efc127/f6b21490acdb4b2b804c23145c301802 [2021-05-06 08:22:40,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:40,041 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:40,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:40,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:40,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:40,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592388dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40, skipping insertion in model container [2021-05-06 08:22:40,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:40,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:40,188 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_valuebound5.c[490,503] [2021-05-06 08:22:40,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:40,245 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:40,253 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_valuebound5.c[490,503] [2021-05-06 08:22:40,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:40,279 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:40,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40 WrapperNode [2021-05-06 08:22:40,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:40,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:40,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:40,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:40,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:40,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:40,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:40,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:40,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (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 08:22:40,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:40,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:40,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:40,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:40,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:40,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:40,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:40,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:40,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:40,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:40,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:40,655 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:40,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:40 BoogieIcfgContainer [2021-05-06 08:22:40,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:40,656 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:40,656 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:40,657 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:40,659 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:40" (1/1) ... [2021-05-06 08:22:40,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:40 BasicIcfg [2021-05-06 08:22:40,685 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:40,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:40,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:40,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:40,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:40" (1/4) ... [2021-05-06 08:22:40,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a6bd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:40, skipping insertion in model container [2021-05-06 08:22:40,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:40" (2/4) ... [2021-05-06 08:22:40,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a6bd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:40, skipping insertion in model container [2021-05-06 08:22:40,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:40" (3/4) ... [2021-05-06 08:22:40,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a6bd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:40, skipping insertion in model container [2021-05-06 08:22:40,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:40" (4/4) ... [2021-05-06 08:22:40,690 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.cJordan [2021-05-06 08:22:40,694 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:40,696 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:40,724 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:40,756 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:40,756 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:40,756 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:40,756 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:40,756 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:40,756 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:40,757 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:40,757 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:40,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:40,773 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:40,773 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:40,776 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:40,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:40,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088436443] [2021-05-06 08:22:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:40,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:40,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:41,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:41,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088436443] [2021-05-06 08:22:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088436443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:41,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:41,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574542665] [2021-05-06 08:22:41,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:41,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:41,040 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:41,168 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:22:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:41,174 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:41,174 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:41,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:41,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:41,201 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:41,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:41,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:41,203 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:41,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:41,204 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:41,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:41,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846165152] [2021-05-06 08:22:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:41,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:41,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809955350] [2021-05-06 08:22:41,238 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 08:22:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:41,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:41,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:41,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846165152] [2021-05-06 08:22:41,395 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809955350] [2021-05-06 08:22:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809955350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:41,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:41,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:41,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552055295] [2021-05-06 08:22:41,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:41,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:41,398 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:41,459 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:41,460 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 08:22:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:41,461 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:41,461 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:41,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:41,467 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:41,467 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:41,467 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:41,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:41,468 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:41,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:41,685 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:41,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:41,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240905227] [2021-05-06 08:22:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:41,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133490462] [2021-05-06 08:22:41,697 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 08:22:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:41,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:41,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:41,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:41,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240905227] [2021-05-06 08:22:41,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:41,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133490462] [2021-05-06 08:22:41,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133490462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:41,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:41,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:41,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596670485] [2021-05-06 08:22:41,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:41,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:41,930 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 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 08:22:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:42,012 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-06 08:22:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 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 37 [2021-05-06 08:22:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:42,014 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:22:42,014 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:22:42,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:22:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:22:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:42,019 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:42,019 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:42,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 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 08:22:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:42,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:42,020 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:42,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:42,236 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:42,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:42,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906037363] [2021-05-06 08:22:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:42,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:42,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096279052] [2021-05-06 08:22:42,246 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 08:22:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:42,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906037363] [2021-05-06 08:22:42,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096279052] [2021-05-06 08:22:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096279052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:42,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:42,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452120510] [2021-05-06 08:22:42,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:42,418 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:42,539 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:42,541 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:42,541 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:42,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:42,548 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:42,548 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:42,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:42,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:42,549 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:42,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:42,764 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:42,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772660648] [2021-05-06 08:22:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:42,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:42,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934201185] [2021-05-06 08:22:42,775 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 08:22:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:42,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:43,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:43,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772660648] [2021-05-06 08:22:43,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:43,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934201185] [2021-05-06 08:22:43,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934201185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:43,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:43,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:43,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58432873] [2021-05-06 08:22:43,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:43,062 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:43,277 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:22:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:43,278 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:43,279 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:43,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:43,284 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:43,284 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:43,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:43,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:43,285 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:43,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:43,502 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:43,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:43,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508386107] [2021-05-06 08:22:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:43,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:43,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574846057] [2021-05-06 08:22:43,511 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 08:22:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:43,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:43,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:43,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508386107] [2021-05-06 08:22:43,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:43,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574846057] [2021-05-06 08:22:43,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574846057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:43,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:43,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:43,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076430582] [2021-05-06 08:22:43,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:43,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:43,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:43,836 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 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 08:22:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:44,076 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-06 08:22:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 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 42 [2021-05-06 08:22:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:44,077 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:22:44,077 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 08:22:44,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 08:22:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 08:22:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 08:22:44,084 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 08:22:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:44,084 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 08:22:44,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 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 08:22:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 08:22:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:44,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:44,085 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:44,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:44,303 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:44,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586289689] [2021-05-06 08:22:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:44,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:44,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303085133] [2021-05-06 08:22:44,312 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 08:22:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:44,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:44,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:44,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586289689] [2021-05-06 08:22:44,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:44,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303085133] [2021-05-06 08:22:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303085133] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:44,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:44,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:44,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692389520] [2021-05-06 08:22:44,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:44,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:44,468 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:44,581 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2021-05-06 08:22:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 08:22:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:44,583 INFO L225 Difference]: With dead ends: 105 [2021-05-06 08:22:44,583 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 08:22:44,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 08:22:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 08:22:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 08:22:44,588 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 08:22:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:44,589 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 08:22:44,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 08:22:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:44,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:44,589 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:44,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:44,807 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-06 08:22:44,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:44,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794191064] [2021-05-06 08:22:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:44,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:44,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951623180] [2021-05-06 08:22:44,816 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 08:22:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:45,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:45,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794191064] [2021-05-06 08:22:45,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951623180] [2021-05-06 08:22:45,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951623180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:45,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:45,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:45,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378332242] [2021-05-06 08:22:45,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:45,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:45,078 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (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 08:22:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:45,175 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-05-06 08:22:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:45,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (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 47 [2021-05-06 08:22:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:45,177 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:22:45,177 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:22:45,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:22:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 08:22:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 08:22:45,183 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 08:22:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:45,184 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 08:22:45,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (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 08:22:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 08:22:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:45,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:45,184 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:45,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:45,402 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-06 08:22:45,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:45,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79565344] [2021-05-06 08:22:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:45,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:45,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750956227] [2021-05-06 08:22:45,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:45,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:45,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:45,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79565344] [2021-05-06 08:22:45,533 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750956227] [2021-05-06 08:22:45,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750956227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:45,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:45,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8781685] [2021-05-06 08:22:45,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:45,534 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:45,589 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-06 08:22:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 08:22:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:45,591 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:22:45,591 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:22:45,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:22:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 08:22:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 08:22:45,595 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 08:22:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:45,595 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 08:22:45,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 08:22:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:45,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:45,596 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:45,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:45,813 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:45,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:45,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699040348] [2021-05-06 08:22:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:45,821 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:45,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78640357] [2021-05-06 08:22:45,821 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 08:22:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:22:46,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:46,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699040348] [2021-05-06 08:22:46,014 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:46,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78640357] [2021-05-06 08:22:46,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78640357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:46,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:46,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:46,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376982312] [2021-05-06 08:22:46,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:46,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:46,015 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:46,054 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-05-06 08:22:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 08:22:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:46,056 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:22:46,056 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:22:46,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:22:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 08:22:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:22:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 08:22:46,061 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 08:22:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:46,061 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 08:22:46,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 08:22:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:46,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,062 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:46,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:46,276 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-06 08:22:46,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:46,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732640874] [2021-05-06 08:22:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:46,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:46,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575566621] [2021-05-06 08:22:46,284 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 08:22:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:46,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:46,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:46,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:46,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732640874] [2021-05-06 08:22:46,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:46,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575566621] [2021-05-06 08:22:46,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575566621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:46,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:46,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:46,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885290621] [2021-05-06 08:22:46,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:46,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:46,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:46,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:46,466 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:46,662 INFO L93 Difference]: Finished difference Result 164 states and 229 transitions. [2021-05-06 08:22:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:46,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 08:22:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:46,665 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:22:46,665 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:22:46,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:22:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 08:22:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:22:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 08:22:46,670 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 08:22:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:46,670 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 08:22:46,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 08:22:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:46,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,671 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:46,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:46,889 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:46,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:46,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913343070] [2021-05-06 08:22:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:46,896 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:46,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774882868] [2021-05-06 08:22:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:22:46,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:22:47,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913343070] [2021-05-06 08:22:47,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774882868] [2021-05-06 08:22:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774882868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:47,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:47,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:47,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403873331] [2021-05-06 08:22:47,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:47,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:47,238 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,574 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2021-05-06 08:22:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,575 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:22:47,575 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 08:22:47,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 08:22:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 08:22:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:22:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 08:22:47,582 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 08:22:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,582 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 08:22:47,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 08:22:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:47,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,583 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:47,801 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-06 08:22:47,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948073513] [2021-05-06 08:22:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365890603] [2021-05-06 08:22:47,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:47,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:47,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:47,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:47,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948073513] [2021-05-06 08:22:47,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365890603] [2021-05-06 08:22:47,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365890603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:47,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:47,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:47,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870802672] [2021-05-06 08:22:47,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:47,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:47,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:47,990 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:48,245 INFO L93 Difference]: Finished difference Result 281 states and 417 transitions. [2021-05-06 08:22:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 08:22:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:48,247 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:22:48,247 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:22:48,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:22:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 08:22:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 08:22:48,257 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 08:22:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:48,257 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 08:22:48,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 08:22:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:48,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:48,258 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:48,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:48,476 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-06 08:22:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:48,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562450922] [2021-05-06 08:22:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:48,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:48,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154592732] [2021-05-06 08:22:48,499 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 08:22:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:48,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:22:48,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:48,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:22:48,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562450922] [2021-05-06 08:22:48,771 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154592732] [2021-05-06 08:22:48,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154592732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:48,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:48,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:48,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041594190] [2021-05-06 08:22:48,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:48,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:48,772 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:49,062 INFO L93 Difference]: Finished difference Result 245 states and 349 transitions. [2021-05-06 08:22:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 08:22:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:49,064 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:22:49,064 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:22:49,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:22:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 232. [2021-05-06 08:22:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 130 states have (on average 1.2153846153846153) internal successors, (158), 135 states have internal predecessors, (158), 87 states have call successors, (87), 15 states have call predecessors, (87), 14 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 330 transitions. [2021-05-06 08:22:49,073 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 330 transitions. Word has length 74 [2021-05-06 08:22:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:49,073 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 330 transitions. [2021-05-06 08:22:49,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 330 transitions. [2021-05-06 08:22:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:49,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:49,074 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:49,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:49,298 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-06 08:22:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:49,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95071265] [2021-05-06 08:22:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:49,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:49,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734342023] [2021-05-06 08:22:49,311 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 08:22:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:49,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 08:22:49,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:49,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95071265] [2021-05-06 08:22:49,494 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:49,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734342023] [2021-05-06 08:22:49,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734342023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:49,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:49,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:49,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501954123] [2021-05-06 08:22:49,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:49,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:49,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:49,495 INFO L87 Difference]: Start difference. First operand 232 states and 330 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:49,594 INFO L93 Difference]: Finished difference Result 244 states and 339 transitions. [2021-05-06 08:22:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 08:22:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:49,610 INFO L225 Difference]: With dead ends: 244 [2021-05-06 08:22:49,610 INFO L226 Difference]: Without dead ends: 244 [2021-05-06 08:22:49,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-06 08:22:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-05-06 08:22:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 144 states have internal predecessors, (167), 87 states have call successors, (87), 18 states have call predecessors, (87), 17 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 339 transitions. [2021-05-06 08:22:49,616 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 339 transitions. Word has length 72 [2021-05-06 08:22:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:49,617 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 339 transitions. [2021-05-06 08:22:49,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 339 transitions. [2021-05-06 08:22:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:49,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:49,617 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:49,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:49,834 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:49,835 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-06 08:22:49,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:49,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76590309] [2021-05-06 08:22:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:49,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:49,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661396660] [2021-05-06 08:22:49,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:49,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:22:49,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:49,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:22:49,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:49,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76590309] [2021-05-06 08:22:49,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:49,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661396660] [2021-05-06 08:22:49,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661396660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:49,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:49,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:49,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37129699] [2021-05-06 08:22:49,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:49,995 INFO L87 Difference]: Start difference. First operand 244 states and 339 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 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 08:22:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:50,055 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2021-05-06 08:22:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 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 77 [2021-05-06 08:22:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:50,056 INFO L225 Difference]: With dead ends: 246 [2021-05-06 08:22:50,056 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 08:22:50,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 08:22:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2021-05-06 08:22:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 135 states have internal predecessors, (159), 75 states have call successors, (75), 18 states have call predecessors, (75), 17 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-06 08:22:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 307 transitions. [2021-05-06 08:22:50,063 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 307 transitions. Word has length 77 [2021-05-06 08:22:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:50,063 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 307 transitions. [2021-05-06 08:22:50,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 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 08:22:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 307 transitions. [2021-05-06 08:22:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:50,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:50,064 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:50,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:50,281 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-06 08:22:50,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:50,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082856949] [2021-05-06 08:22:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:50,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:50,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962881159] [2021-05-06 08:22:50,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:50,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:22:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:50,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:50,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082856949] [2021-05-06 08:22:50,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962881159] [2021-05-06 08:22:50,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962881159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:50,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:50,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453555840] [2021-05-06 08:22:50,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:50,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:50,454 INFO L87 Difference]: Start difference. First operand 227 states and 307 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:50,493 INFO L93 Difference]: Finished difference Result 248 states and 337 transitions. [2021-05-06 08:22:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:50,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 08:22:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:50,495 INFO L225 Difference]: With dead ends: 248 [2021-05-06 08:22:50,495 INFO L226 Difference]: Without dead ends: 248 [2021-05-06 08:22:50,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-06 08:22:50,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2021-05-06 08:22:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 142 states have internal predecessors, (168), 83 states have call successors, (83), 19 states have call predecessors, (83), 18 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 332 transitions. [2021-05-06 08:22:50,501 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 332 transitions. Word has length 77 [2021-05-06 08:22:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:50,501 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 332 transitions. [2021-05-06 08:22:50,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 332 transitions. [2021-05-06 08:22:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:22:50,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:50,502 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1] [2021-05-06 08:22:50,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:50,722 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-06 08:22:50,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:50,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400231041] [2021-05-06 08:22:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:50,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:50,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010718967] [2021-05-06 08:22:50,736 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 08:22:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:22:50,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:50,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:50,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:50,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400231041] [2021-05-06 08:22:50,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:50,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010718967] [2021-05-06 08:22:50,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010718967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:50,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:50,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:50,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167617196] [2021-05-06 08:22:50,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:50,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:50,991 INFO L87 Difference]: Start difference. First operand 243 states and 332 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:51,303 INFO L93 Difference]: Finished difference Result 321 states and 441 transitions. [2021-05-06 08:22:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:51,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 08:22:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:51,306 INFO L225 Difference]: With dead ends: 321 [2021-05-06 08:22:51,306 INFO L226 Difference]: Without dead ends: 321 [2021-05-06 08:22:51,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-06 08:22:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 261. [2021-05-06 08:22:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 152 states have internal predecessors, (176), 91 states have call successors, (91), 21 states have call predecessors, (91), 20 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-05-06 08:22:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 356 transitions. [2021-05-06 08:22:51,316 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 356 transitions. Word has length 79 [2021-05-06 08:22:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:51,316 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 356 transitions. [2021-05-06 08:22:51,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 356 transitions. [2021-05-06 08:22:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:51,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:51,317 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 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] [2021-05-06 08:22:51,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:51,533 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-06 08:22:51,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:51,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277841018] [2021-05-06 08:22:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:51,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:51,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743600236] [2021-05-06 08:22:51,545 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 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 08:22:51,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:51,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-06 08:22:51,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:51,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:52,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:52,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277841018] [2021-05-06 08:22:52,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:52,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743600236] [2021-05-06 08:22:52,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743600236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:52,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:52,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:52,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071837279] [2021-05-06 08:22:52,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:22:52,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:22:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:52,038 INFO L87 Difference]: Start difference. First operand 261 states and 356 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:22:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:52,628 INFO L93 Difference]: Finished difference Result 327 states and 440 transitions. [2021-05-06 08:22:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:52,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2021-05-06 08:22:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:52,630 INFO L225 Difference]: With dead ends: 327 [2021-05-06 08:22:52,630 INFO L226 Difference]: Without dead ends: 327 [2021-05-06 08:22:52,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-06 08:22:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 265. [2021-05-06 08:22:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 155 states have internal predecessors, (179), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-05-06 08:22:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 359 transitions. [2021-05-06 08:22:52,637 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 359 transitions. Word has length 77 [2021-05-06 08:22:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:52,637 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 359 transitions. [2021-05-06 08:22:52,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:22:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 359 transitions. [2021-05-06 08:22:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:22:52,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:52,638 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-06 08:22:52,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:52,855 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2021-05-06 08:22:52,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:52,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17458606] [2021-05-06 08:22:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:52,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:52,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006495061] [2021-05-06 08:22:52,862 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 08:22:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 08:22:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:52,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:22:53,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:53,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17458606] [2021-05-06 08:22:53,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:53,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006495061] [2021-05-06 08:22:53,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006495061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:53,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:53,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:53,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113800256] [2021-05-06 08:22:53,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:53,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:53,311 INFO L87 Difference]: Start difference. First operand 265 states and 359 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:53,955 INFO L93 Difference]: Finished difference Result 351 states and 480 transitions. [2021-05-06 08:22:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 08:22:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:53,957 INFO L225 Difference]: With dead ends: 351 [2021-05-06 08:22:53,957 INFO L226 Difference]: Without dead ends: 350 [2021-05-06 08:22:53,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-06 08:22:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 330. [2021-05-06 08:22:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 189 states have internal predecessors, (222), 119 states have call successors, (119), 25 states have call predecessors, (119), 24 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2021-05-06 08:22:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 458 transitions. [2021-05-06 08:22:53,965 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 458 transitions. Word has length 86 [2021-05-06 08:22:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:53,965 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 458 transitions. [2021-05-06 08:22:53,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 458 transitions. [2021-05-06 08:22:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:53,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:53,966 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:54,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:54,181 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:54,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:54,181 INFO L82 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 2 times [2021-05-06 08:22:54,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:54,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026205607] [2021-05-06 08:22:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:54,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:54,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343541757] [2021-05-06 08:22:54,188 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 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 08:22:54,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:54,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:22:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:54,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:54,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:54,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026205607] [2021-05-06 08:22:54,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:54,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343541757] [2021-05-06 08:22:54,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343541757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:54,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:54,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:54,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495530771] [2021-05-06 08:22:54,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:54,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:54,703 INFO L87 Difference]: Start difference. First operand 330 states and 458 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:55,421 INFO L93 Difference]: Finished difference Result 424 states and 586 transitions. [2021-05-06 08:22:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 08:22:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:55,424 INFO L225 Difference]: With dead ends: 424 [2021-05-06 08:22:55,424 INFO L226 Difference]: Without dead ends: 423 [2021-05-06 08:22:55,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-06 08:22:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 399. [2021-05-06 08:22:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 223 states have (on average 1.201793721973094) internal successors, (268), 226 states have internal predecessors, (268), 147 states have call successors, (147), 29 states have call predecessors, (147), 28 states have return successors, (145), 143 states have call predecessors, (145), 145 states have call successors, (145) [2021-05-06 08:22:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 560 transitions. [2021-05-06 08:22:55,434 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 560 transitions. Word has length 91 [2021-05-06 08:22:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:55,435 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 560 transitions. [2021-05-06 08:22:55,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 560 transitions. [2021-05-06 08:22:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 08:22:55,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:55,436 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:55,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:22:55,654 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1005767165, now seen corresponding path program 2 times [2021-05-06 08:22:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:55,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265016836] [2021-05-06 08:22:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:55,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:55,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315881000] [2021-05-06 08:22:55,660 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 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 08:22:55,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:22:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:55,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-06 08:22:56,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:56,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265016836] [2021-05-06 08:22:56,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:56,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315881000] [2021-05-06 08:22:56,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315881000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:56,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:56,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:56,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684139400] [2021-05-06 08:22:56,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:56,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:56,081 INFO L87 Difference]: Start difference. First operand 399 states and 560 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:56,412 INFO L93 Difference]: Finished difference Result 426 states and 588 transitions. [2021-05-06 08:22:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 96 [2021-05-06 08:22:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:56,414 INFO L225 Difference]: With dead ends: 426 [2021-05-06 08:22:56,415 INFO L226 Difference]: Without dead ends: 426 [2021-05-06 08:22:56,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-05-06 08:22:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 409. [2021-05-06 08:22:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 229 states have (on average 1.1877729257641922) internal successors, (272), 234 states have internal predecessors, (272), 149 states have call successors, (149), 31 states have call predecessors, (149), 30 states have return successors, (147), 143 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 08:22:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 568 transitions. [2021-05-06 08:22:56,425 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 568 transitions. Word has length 96 [2021-05-06 08:22:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:56,425 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 568 transitions. [2021-05-06 08:22:56,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 568 transitions. [2021-05-06 08:22:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:22:56,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:56,426 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:56,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:22:56,644 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash 561452732, now seen corresponding path program 2 times [2021-05-06 08:22:56,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:56,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103300551] [2021-05-06 08:22:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:56,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:56,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298995261] [2021-05-06 08:22:56,654 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 08:22:56,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-06 08:22:57,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:57,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103300551] [2021-05-06 08:22:57,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:57,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298995261] [2021-05-06 08:22:57,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298995261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:57,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:57,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:57,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482788202] [2021-05-06 08:22:57,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:57,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:57,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:57,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:57,030 INFO L87 Difference]: Start difference. First operand 409 states and 568 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:57,538 INFO L93 Difference]: Finished difference Result 505 states and 707 transitions. [2021-05-06 08:22:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 08:22:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:57,541 INFO L225 Difference]: With dead ends: 505 [2021-05-06 08:22:57,541 INFO L226 Difference]: Without dead ends: 505 [2021-05-06 08:22:57,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:22:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-06 08:22:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 411. [2021-05-06 08:22:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 232 states have (on average 1.1810344827586208) internal successors, (274), 237 states have internal predecessors, (274), 147 states have call successors, (147), 32 states have call predecessors, (147), 31 states have return successors, (145), 141 states have call predecessors, (145), 145 states have call successors, (145) [2021-05-06 08:22:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 566 transitions. [2021-05-06 08:22:57,557 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 566 transitions. Word has length 101 [2021-05-06 08:22:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:57,558 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 566 transitions. [2021-05-06 08:22:57,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 566 transitions. [2021-05-06 08:22:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:22:57,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:57,559 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:57,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:57,777 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash 132172733, now seen corresponding path program 1 times [2021-05-06 08:22:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:57,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015204283] [2021-05-06 08:22:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:57,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:57,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524810262] [2021-05-06 08:22:57,784 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 08:22:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:57,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 08:22:58,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:58,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015204283] [2021-05-06 08:22:58,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:58,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524810262] [2021-05-06 08:22:58,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524810262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:58,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:58,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534527724] [2021-05-06 08:22:58,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:58,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:58,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:58,125 INFO L87 Difference]: Start difference. First operand 411 states and 566 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:58,697 INFO L93 Difference]: Finished difference Result 600 states and 861 transitions. [2021-05-06 08:22:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:22:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 104 [2021-05-06 08:22:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:58,699 INFO L225 Difference]: With dead ends: 600 [2021-05-06 08:22:58,700 INFO L226 Difference]: Without dead ends: 600 [2021-05-06 08:22:58,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:22:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-05-06 08:22:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 506. [2021-05-06 08:22:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 289 states have (on average 1.1903114186851211) internal successors, (344), 294 states have internal predecessors, (344), 183 states have call successors, (183), 34 states have call predecessors, (183), 33 states have return successors, (181), 177 states have call predecessors, (181), 181 states have call successors, (181) [2021-05-06 08:22:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 708 transitions. [2021-05-06 08:22:58,712 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 708 transitions. Word has length 104 [2021-05-06 08:22:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:58,713 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 708 transitions. [2021-05-06 08:22:58,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 708 transitions. [2021-05-06 08:22:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:22:58,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:58,714 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 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, 1, 1] [2021-05-06 08:22:58,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:22:58,933 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 5 times [2021-05-06 08:22:58,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:58,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276269276] [2021-05-06 08:22:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:58,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:58,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76979401] [2021-05-06 08:22:58,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:59,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:22:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:22:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 08:22:59,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:59,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276269276] [2021-05-06 08:22:59,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:59,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76979401] [2021-05-06 08:22:59,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76979401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:59,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:59,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:22:59,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240158070] [2021-05-06 08:22:59,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:22:59,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:22:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:59,699 INFO L87 Difference]: Start difference. First operand 506 states and 708 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:00,424 INFO L93 Difference]: Finished difference Result 634 states and 885 transitions. [2021-05-06 08:23:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 08:23:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:00,426 INFO L225 Difference]: With dead ends: 634 [2021-05-06 08:23:00,426 INFO L226 Difference]: Without dead ends: 634 [2021-05-06 08:23:00,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:23:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-05-06 08:23:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 603. [2021-05-06 08:23:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 341 states have (on average 1.1994134897360704) internal successors, (409), 346 states have internal predecessors, (409), 223 states have call successors, (223), 39 states have call predecessors, (223), 38 states have return successors, (221), 217 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 08:23:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 853 transitions. [2021-05-06 08:23:00,439 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 853 transitions. Word has length 102 [2021-05-06 08:23:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:00,439 INFO L480 AbstractCegarLoop]: Abstraction has 603 states and 853 transitions. [2021-05-06 08:23:00,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 853 transitions. [2021-05-06 08:23:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:23:00,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:00,440 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:00,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:00,658 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:00,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1716502634, now seen corresponding path program 3 times [2021-05-06 08:23:00,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:00,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049154745] [2021-05-06 08:23:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:00,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:00,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495012118] [2021-05-06 08:23:00,666 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 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 08:23:00,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:23:00,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:23:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:00,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 68 proven. 14 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-05-06 08:23:01,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:01,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049154745] [2021-05-06 08:23:01,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:01,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495012118] [2021-05-06 08:23:01,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495012118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:01,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:01,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:23:01,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090466229] [2021-05-06 08:23:01,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:23:01,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:01,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:23:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:23:01,425 INFO L87 Difference]: Start difference. First operand 603 states and 853 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:23:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:03,196 INFO L93 Difference]: Finished difference Result 686 states and 971 transitions. [2021-05-06 08:23:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 108 [2021-05-06 08:23:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:03,198 INFO L225 Difference]: With dead ends: 686 [2021-05-06 08:23:03,198 INFO L226 Difference]: Without dead ends: 685 [2021-05-06 08:23:03,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:23:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-05-06 08:23:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 668. [2021-05-06 08:23:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 375 states have (on average 1.2026666666666668) internal successors, (451), 380 states have internal predecessors, (451), 251 states have call successors, (251), 42 states have call predecessors, (251), 41 states have return successors, (249), 245 states have call predecessors, (249), 249 states have call successors, (249) [2021-05-06 08:23:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 951 transitions. [2021-05-06 08:23:03,212 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 951 transitions. Word has length 108 [2021-05-06 08:23:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:03,212 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 951 transitions. [2021-05-06 08:23:03,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:23:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 951 transitions. [2021-05-06 08:23:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 08:23:03,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:03,213 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:03,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:03,431 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:03,431 INFO L82 PathProgramCache]: Analyzing trace with hash -220273802, now seen corresponding path program 2 times [2021-05-06 08:23:03,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:03,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398832874] [2021-05-06 08:23:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:03,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:03,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186165755] [2021-05-06 08:23:03,438 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 08:23:03,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:23:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:03,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 08:23:03,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:03,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398832874] [2021-05-06 08:23:03,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:03,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186165755] [2021-05-06 08:23:03,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186165755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:03,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:03,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:23:03,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429169964] [2021-05-06 08:23:03,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:23:03,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:03,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:23:03,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:03,761 INFO L87 Difference]: Start difference. First operand 668 states and 951 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:23:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:04,749 INFO L93 Difference]: Finished difference Result 841 states and 1210 transitions. [2021-05-06 08:23:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 08:23:04,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 109 [2021-05-06 08:23:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:04,753 INFO L225 Difference]: With dead ends: 841 [2021-05-06 08:23:04,753 INFO L226 Difference]: Without dead ends: 841 [2021-05-06 08:23:04,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 08:23:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-05-06 08:23:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 763. [2021-05-06 08:23:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 422 states have (on average 1.2132701421800949) internal successors, (512), 427 states have internal predecessors, (512), 295 states have call successors, (295), 46 states have call predecessors, (295), 45 states have return successors, (293), 289 states have call predecessors, (293), 293 states have call successors, (293) [2021-05-06 08:23:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1100 transitions. [2021-05-06 08:23:04,771 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1100 transitions. Word has length 109 [2021-05-06 08:23:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:04,771 INFO L480 AbstractCegarLoop]: Abstraction has 763 states and 1100 transitions. [2021-05-06 08:23:04,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:23:04,771 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1100 transitions. [2021-05-06 08:23:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:23:04,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:04,772 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 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 08:23:05,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:05,001 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1501596464, now seen corresponding path program 6 times [2021-05-06 08:23:05,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:05,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972204610] [2021-05-06 08:23:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:05,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:05,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149205643] [2021-05-06 08:23:05,007 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 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 08:23:05,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:23:05,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:23:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:05,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:23:05,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:05,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972204610] [2021-05-06 08:23:05,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:05,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149205643] [2021-05-06 08:23:05,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149205643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:05,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:05,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222574826] [2021-05-06 08:23:05,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:05,338 INFO L87 Difference]: Start difference. First operand 763 states and 1100 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:05,977 INFO L93 Difference]: Finished difference Result 799 states and 1132 transitions. [2021-05-06 08:23:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 107 [2021-05-06 08:23:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:05,979 INFO L225 Difference]: With dead ends: 799 [2021-05-06 08:23:05,980 INFO L226 Difference]: Without dead ends: 799 [2021-05-06 08:23:05,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:23:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-05-06 08:23:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 783. [2021-05-06 08:23:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 437 states have (on average 1.205949656750572) internal successors, (527), 442 states have internal predecessors, (527), 295 states have call successors, (295), 51 states have call predecessors, (295), 50 states have return successors, (293), 289 states have call predecessors, (293), 293 states have call successors, (293) [2021-05-06 08:23:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1115 transitions. [2021-05-06 08:23:05,995 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1115 transitions. Word has length 107 [2021-05-06 08:23:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:05,995 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 1115 transitions. [2021-05-06 08:23:05,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1115 transitions. [2021-05-06 08:23:05,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:23:05,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:05,996 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:06,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:23:06,213 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 4 times [2021-05-06 08:23:06,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:06,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531793613] [2021-05-06 08:23:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:06,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:06,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158302390] [2021-05-06 08:23:06,218 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 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 08:23:06,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:06,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 08:23:06,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:06,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-06 08:23:06,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531793613] [2021-05-06 08:23:06,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158302390] [2021-05-06 08:23:06,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158302390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:06,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:06,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:23:06,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562665621] [2021-05-06 08:23:06,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:23:06,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:23:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:23:06,838 INFO L87 Difference]: Start difference. First operand 783 states and 1115 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:23:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:07,672 INFO L93 Difference]: Finished difference Result 773 states and 1084 transitions. [2021-05-06 08:23:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2021-05-06 08:23:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:07,675 INFO L225 Difference]: With dead ends: 773 [2021-05-06 08:23:07,676 INFO L226 Difference]: Without dead ends: 748 [2021-05-06 08:23:07,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:23:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-06 08:23:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 744. [2021-05-06 08:23:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 419 states have (on average 1.2004773269689737) internal successors, (503), 423 states have internal predecessors, (503), 276 states have call successors, (276), 49 states have call predecessors, (276), 48 states have return successors, (274), 271 states have call predecessors, (274), 274 states have call successors, (274) [2021-05-06 08:23:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1053 transitions. [2021-05-06 08:23:07,696 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1053 transitions. Word has length 111 [2021-05-06 08:23:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:07,696 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1053 transitions. [2021-05-06 08:23:07,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:23:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1053 transitions. [2021-05-06 08:23:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:23:07,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:07,698 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:07,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:07,918 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash 603574991, now seen corresponding path program 5 times [2021-05-06 08:23:07,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:07,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580926100] [2021-05-06 08:23:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:07,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:07,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205576479] [2021-05-06 08:23:07,924 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 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 08:23:08,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:23:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-06 08:23:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:08,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:08,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:09,603 WARN L159 QuantifierPusher]: Ignoring assumption.