/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:07:57,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:07:57,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:07:57,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:07:57,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:07:57,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:07:57,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:07:57,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:07:57,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:07:57,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:07:57,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:07:57,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:07:57,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:07:57,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:07:57,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:07:57,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:07:57,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:07:57,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:07:57,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:07:57,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:07:57,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:07:57,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:07:57,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:07:57,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:07:57,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:07:57,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:07:57,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:07:57,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:07:57,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:07:57,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:07:57,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:07:57,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:07:57,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:07:57,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:07:57,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:07:57,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:07:57,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:07:57,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:07:57,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:07:57,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:07:57,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:07:57,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:07:57,827 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:07:57,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-06 08:07:57,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c7962be/c8371185fda34fb3b1049f9fe3a6c9ba/FLAGaaf22624f [2021-05-06 08:07:58,311 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:07:58,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-06 08:07:58,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c7962be/c8371185fda34fb3b1049f9fe3a6c9ba/FLAGaaf22624f [2021-05-06 08:07:58,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c7962be/c8371185fda34fb3b1049f9fe3a6c9ba [2021-05-06 08:07:58,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:07:58,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:07:58,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:07:58,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:07:58,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:07:58,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ed8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58, skipping insertion in model container [2021-05-06 08:07:58,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:07:58,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:07:58,858 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2021-05-06 08:07:58,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:07:58,941 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:07:58,951 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2021-05-06 08:07:58,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:07:58,971 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:07:58,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58 WrapperNode [2021-05-06 08:07:58,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:07:58,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:07:58,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:07:58,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:07:58,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... [2021-05-06 08:07:58,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:07:58,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:07:58,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:07:58,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:07:58,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:07:59,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:07:59,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:07:59,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:07:59,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:07:59,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:07:59,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:07:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:07:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:07:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:07:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:07:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:07:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:07:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:07:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:07:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:07:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:07:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:07:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:07:59,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:07:59,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:07:59,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:07:59,298 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:07:59,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:59 BoogieIcfgContainer [2021-05-06 08:07:59,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:07:59,300 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:07:59,300 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:07:59,300 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:07:59,302 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:59" (1/1) ... [2021-05-06 08:07:59,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:07:59 BasicIcfg [2021-05-06 08:07:59,315 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:07:59,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:07:59,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:07:59,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:07:59,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:07:58" (1/4) ... [2021-05-06 08:07:59,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3124d21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:07:59, skipping insertion in model container [2021-05-06 08:07:59,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:58" (2/4) ... [2021-05-06 08:07:59,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3124d21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:07:59, skipping insertion in model container [2021-05-06 08:07:59,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:59" (3/4) ... [2021-05-06 08:07:59,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3124d21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:07:59, skipping insertion in model container [2021-05-06 08:07:59,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:07:59" (4/4) ... [2021-05-06 08:07:59,322 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.cJordan [2021-05-06 08:07:59,326 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:07:59,333 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:07:59,347 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:07:59,362 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:07:59,362 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:07:59,363 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:07:59,363 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:07:59,363 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:07:59,363 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:07:59,363 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:07:59,363 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:07:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 08:07:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:07:59,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:59,380 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:59,380 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-06 08:07:59,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:59,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614162316] [2021-05-06 08:07:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:07:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:07:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:07:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:07:59,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:59,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614162316] [2021-05-06 08:07:59,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614162316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:59,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:07:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461949897] [2021-05-06 08:07:59,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:07:59,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:07:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:07:59,635 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:07:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:59,718 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-06 08:07:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:07:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 08:07:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:59,725 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:07:59,725 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:07:59,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:07:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:07:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 08:07:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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 08:07:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 08:07:59,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 08:07:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:59,753 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 08:07:59,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:07:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 08:07:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:07:59,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:59,754 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:59,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:07:59,755 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:59,755 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-06 08:07:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:59,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828952622] [2021-05-06 08:07:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:07:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:07:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:07:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:07:59,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:59,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828952622] [2021-05-06 08:07:59,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828952622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:59,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:59,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:59,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559356586] [2021-05-06 08:07:59,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:59,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:59,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:59,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:59,860 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:08:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:00,007 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 08:08:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:08:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:08:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:00,010 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:08:00,011 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:08:00,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:08:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:08:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 08:08:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:08:00,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 08:08:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:00,028 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:08:00,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:08:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:08:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:08:00,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:00,033 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:00,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:08:00,037 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-06 08:08:00,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:00,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611876541] [2021-05-06 08:08:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:00,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:00,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869877442] [2021-05-06 08:08:00,059 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 08:08:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:08:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:00,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:08:00,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:00,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611876541] [2021-05-06 08:08:00,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:00,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869877442] [2021-05-06 08:08:00,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869877442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:00,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:00,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:00,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831021532] [2021-05-06 08:08:00,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:00,281 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:08:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:00,331 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-06 08:08:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:00,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:08:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:00,334 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:08:00,334 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:08:00,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:08:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 08:08:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:08:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 08:08:00,348 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 08:08:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:00,349 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 08:08:00,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:08:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 08:08:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:08:00,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:00,351 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:00,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:08:00,575 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-06 08:08:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:00,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108811280] [2021-05-06 08:08:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:00,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:00,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24742826] [2021-05-06 08:08:00,594 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 08:08:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:08:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:00,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:00,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:00,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:08:00,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:00,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108811280] [2021-05-06 08:08:00,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:00,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24742826] [2021-05-06 08:08:00,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24742826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:00,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:00,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:08:00,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146784621] [2021-05-06 08:08:00,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:00,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:00,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:00,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:00,868 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:08:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:01,038 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-06 08:08:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:08:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:08:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:01,041 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:08:01,041 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:08:01,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:08:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 08:08:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:08:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 08:08:01,048 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 08:08:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:01,048 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 08:08:01,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:08:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 08:08:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:08:01,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:01,065 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:01,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:01,285 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-06 08:08:01,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:01,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493096865] [2021-05-06 08:08:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:01,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:01,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795174424] [2021-05-06 08:08:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:08:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:08:01,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:01,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 08:08:01,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:01,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493096865] [2021-05-06 08:08:01,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:01,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795174424] [2021-05-06 08:08:01,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795174424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:01,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:01,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:01,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114633022] [2021-05-06 08:08:01,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:01,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:01,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:01,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:01,442 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:08:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:01,476 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-06 08:08:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:01,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:08:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:01,477 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:08:01,477 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:08:01,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 08:08:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:08:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:08:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:08:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 08:08:01,482 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 08:08:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:01,483 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 08:08:01,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:08:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 08:08:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:08:01,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:01,484 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:01,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:01,701 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-06 08:08:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:01,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091575893] [2021-05-06 08:08:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:01,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:01,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161355203] [2021-05-06 08:08:01,710 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 08:08:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:08:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:01,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:08:01,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091575893] [2021-05-06 08:08:01,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161355203] [2021-05-06 08:08:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161355203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:01,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:01,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:01,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837141199] [2021-05-06 08:08:01,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:01,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:01,816 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:08:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:01,843 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-06 08:08:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 08:08:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:01,844 INFO L225 Difference]: With dead ends: 75 [2021-05-06 08:08:01,844 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:08:01,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:08:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 08:08:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:08:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 08:08:01,849 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 08:08:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:01,850 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 08:08:01,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:08:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 08:08:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:08:01,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:01,851 INFO L523 BasicCegarLoop]: trace histogram [4, 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 08:08:02,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:02,069 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-06 08:08:02,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:02,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47844181] [2021-05-06 08:08:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:02,079 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:02,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943223657] [2021-05-06 08:08:02,079 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 08:08:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:08:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:08:02,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:02,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47844181] [2021-05-06 08:08:02,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:02,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943223657] [2021-05-06 08:08:02,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943223657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:02,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:02,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:08:02,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052482969] [2021-05-06 08:08:02,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:02,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:02,270 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:08:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:02,316 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-06 08:08:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:08:02,316 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), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:08:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:02,317 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:08:02,317 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 08:08:02,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 08:08:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 08:08:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:08:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 08:08:02,338 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 08:08:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:02,338 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 08:08:02,338 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), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:08:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 08:08:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:08:02,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:02,339 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:02,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 08:08:02,557 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-06 08:08:02,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:02,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821071192] [2021-05-06 08:08:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:02,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:02,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479821655] [2021-05-06 08:08:02,566 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 08:08:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:08:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:02,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:08:02,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821071192] [2021-05-06 08:08:02,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479821655] [2021-05-06 08:08:02,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479821655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:02,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:02,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481016509] [2021-05-06 08:08:02,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:02,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:02,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:02,698 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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 08:08:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:02,728 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-06 08:08:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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 42 [2021-05-06 08:08:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:02,729 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:08:02,729 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:08:02,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:08:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 08:08:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:08:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 08:08:02,749 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 08:08:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:02,749 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 08:08:02,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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 08:08:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 08:08:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:08:02,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:02,750 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-05-06 08:08:02,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:02,973 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-06 08:08:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:02,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133752403] [2021-05-06 08:08:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:02,980 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:02,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441419677] [2021-05-06 08:08:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:08:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:08:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:03,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,117 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 08:08:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133752403] [2021-05-06 08:08:03,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441419677] [2021-05-06 08:08:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441419677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:03,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:03,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:08:03,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650257812] [2021-05-06 08:08:03,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:03,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:03,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:03,119 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (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 08:08:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:03,264 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:08:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:08:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (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 44 [2021-05-06 08:08:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:03,265 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:08:03,265 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:08:03,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:08:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:08:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 08:08:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:08:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 08:08:03,271 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 08:08:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:03,272 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 08:08:03,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (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 08:08:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 08:08:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:08:03,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:03,273 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-06 08:08:03,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:03,497 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-06 08:08:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:03,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420792101] [2021-05-06 08:08:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:03,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:03,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976432241] [2021-05-06 08:08:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:08:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:08:03,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:03,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420792101] [2021-05-06 08:08:03,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:03,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976432241] [2021-05-06 08:08:03,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976432241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:03,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:03,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:08:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167736445] [2021-05-06 08:08:03,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:08:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:08:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:08:03,692 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:08:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:03,799 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-06 08:08:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:08:03,800 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 08:08:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:03,801 INFO L225 Difference]: With dead ends: 129 [2021-05-06 08:08:03,801 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 08:08:03,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:08:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 08:08:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 08:08:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:08:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 08:08:03,807 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 08:08:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:03,807 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 08:08:03,808 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:08:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 08:08:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:08:03,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:03,808 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:04,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:08:04,024 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-06 08:08:04,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:04,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581146725] [2021-05-06 08:08:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:04,032 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:04,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397567585] [2021-05-06 08:08:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:04,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:08:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:04,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 08:08:04,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:04,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581146725] [2021-05-06 08:08:04,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:04,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397567585] [2021-05-06 08:08:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397567585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:04,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:08:04,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766147293] [2021-05-06 08:08:04,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:04,251 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:08:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:04,374 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-06 08:08:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:08:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 08:08:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:04,376 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:08:04,376 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 08:08:04,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 08:08:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 08:08:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:08:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 08:08:04,384 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 08:08:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:04,384 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 08:08:04,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:08:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 08:08:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:08:04,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:04,385 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:08:04,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:04,610 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-06 08:08:04,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:04,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490561560] [2021-05-06 08:08:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:04,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:04,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061607368] [2021-05-06 08:08:04,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:04,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:04,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:08:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:04,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:08:04,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:04,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490561560] [2021-05-06 08:08:04,793 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:04,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061607368] [2021-05-06 08:08:04,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061607368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:04,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:04,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:08:04,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243170341] [2021-05-06 08:08:04,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:08:04,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:08:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:04,795 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:08:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:04,843 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-05-06 08:08:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:08:04,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 08:08:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:04,845 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:08:04,845 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:08:04,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:08:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:08:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:08:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 08:08:04,853 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 08:08:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:04,853 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 08:08:04,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:08:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 08:08:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:08:04,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:04,854 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:08:05,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:05,066 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2021-05-06 08:08:05,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:05,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672249706] [2021-05-06 08:08:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:05,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:05,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377341266] [2021-05-06 08:08:05,075 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 08:08:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:05,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:08:05,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:05,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:08:05,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672249706] [2021-05-06 08:08:05,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377341266] [2021-05-06 08:08:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377341266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:05,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:05,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:08:05,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601781099] [2021-05-06 08:08:05,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:08:05,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:08:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:08:05,443 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:08:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:05,537 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2021-05-06 08:08:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:08:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 08:08:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:05,539 INFO L225 Difference]: With dead ends: 186 [2021-05-06 08:08:05,540 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:08:05,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:08:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 08:08:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:08:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:08:05,564 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 08:08:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:05,564 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:08:05,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:08:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:08:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:08:05,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:05,566 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:08:05,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:08:05,766 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1121480771, now seen corresponding path program 2 times [2021-05-06 08:08:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:05,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098552969] [2021-05-06 08:08:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:05,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:05,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753444642] [2021-05-06 08:08:05,774 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 08:08:05,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:05,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:08:05,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:05,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:08:05,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:05,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098552969] [2021-05-06 08:08:05,957 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:05,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753444642] [2021-05-06 08:08:05,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753444642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:05,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:05,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:08:05,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144850470] [2021-05-06 08:08:05,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:08:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:08:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:08:05,958 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:08:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:06,033 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-05-06 08:08:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:08:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 08:08:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:06,035 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:08:06,035 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:08:06,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:08:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:08:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 08:08:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 08:08:06,042 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 08:08:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:06,042 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 08:08:06,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:08:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 08:08:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:08:06,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:06,043 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:06,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:08:06,267 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash -718576292, now seen corresponding path program 2 times [2021-05-06 08:08:06,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:06,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767993759] [2021-05-06 08:08:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:06,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:06,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539411751] [2021-05-06 08:08:06,276 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 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 08:08:06,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:06,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:08:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:06,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 08:08:06,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767993759] [2021-05-06 08:08:06,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539411751] [2021-05-06 08:08:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539411751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:06,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:06,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:08:06,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644046168] [2021-05-06 08:08:06,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:08:06,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:08:06,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:08:06,550 INFO L87 Difference]: Start difference. First operand 192 states and 242 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:08:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:06,780 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2021-05-06 08:08:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:08:06,781 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 08:08:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:06,782 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:08:06,782 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 08:08:06,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:08:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 08:08:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 08:08:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:08:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 08:08:06,790 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 08:08:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:06,790 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 08:08:06,790 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:08:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 08:08:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:08:06,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:06,791 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 08:08:07,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:08:07,016 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash -367776355, now seen corresponding path program 3 times [2021-05-06 08:08:07,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:07,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205938163] [2021-05-06 08:08:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:07,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042808718] [2021-05-06 08:08:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:07,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:08:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:08:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:07,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:08:07,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205938163] [2021-05-06 08:08:07,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042808718] [2021-05-06 08:08:07,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042808718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:07,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:07,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:08:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359164282] [2021-05-06 08:08:07,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:07,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:07,257 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:08:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:07,414 INFO L93 Difference]: Finished difference Result 233 states and 300 transitions. [2021-05-06 08:08:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:08:07,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 08:08:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:07,416 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:08:07,416 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:08:07,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:08:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:08:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 08:08:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:08:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 08:08:07,425 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 08:08:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:07,425 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 08:08:07,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:08:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 08:08:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:08:07,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:07,426 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-06 08:08:07,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:07,641 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash 876232379, now seen corresponding path program 4 times [2021-05-06 08:08:07,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:07,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036680484] [2021-05-06 08:08:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:07,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:07,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280576679] [2021-05-06 08:08:07,650 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 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 08:08:07,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:08:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:08:07,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:07,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 43 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 08:08:08,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036680484] [2021-05-06 08:08:08,002 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280576679] [2021-05-06 08:08:08,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280576679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:08,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:08,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:08:08,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645891525] [2021-05-06 08:08:08,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:08:08,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:08:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:08,006 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:08:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:08,292 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2021-05-06 08:08:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:08:08,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 08:08:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:08,294 INFO L225 Difference]: With dead ends: 240 [2021-05-06 08:08:08,294 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 08:08:08,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:08:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 08:08:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 08:08:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:08:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 08:08:08,301 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 08:08:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:08,302 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 08:08:08,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:08:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 08:08:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:08:08,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:08,303 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:08,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:08:08,517 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:08,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:08,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1468434662, now seen corresponding path program 3 times [2021-05-06 08:08:08,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:08,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452616339] [2021-05-06 08:08:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:08,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:08,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914178455] [2021-05-06 08:08:08,524 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 08:08:08,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:08:08,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:08:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:08:08,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:08,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452616339] [2021-05-06 08:08:08,771 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914178455] [2021-05-06 08:08:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914178455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:08,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:08,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:08:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876793662] [2021-05-06 08:08:08,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:08:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:08:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:08,774 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:08:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:09,095 INFO L93 Difference]: Finished difference Result 227 states and 290 transitions. [2021-05-06 08:08:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:08:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 08:08:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:09,097 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:08:09,097 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:08:09,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:08:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:08:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 08:08:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 08:08:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 08:08:09,104 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 08:08:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:09,104 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 08:08:09,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:08:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 08:08:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:08:09,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:09,105 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2021-05-06 08:08:09,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:08:09,317 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1531334864, now seen corresponding path program 3 times [2021-05-06 08:08:09,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:09,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429177680] [2021-05-06 08:08:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:09,324 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:09,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475993651] [2021-05-06 08:08:09,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:09,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:08:09,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:09,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:08:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:09,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:08:09,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:09,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429177680] [2021-05-06 08:08:09,584 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:09,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475993651] [2021-05-06 08:08:09,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475993651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:09,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:09,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:08:09,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108282305] [2021-05-06 08:08:09,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:08:09,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:09,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:08:09,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:08:09,586 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:08:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:09,686 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2021-05-06 08:08:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:08:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 08:08:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:09,687 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:08:09,687 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:08:09,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:08:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 08:08:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 08:08:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 08:08:09,694 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 08:08:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:09,694 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 08:08:09,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:08:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 08:08:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:08:09,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:09,696 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:09,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:09,909 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1875056275, now seen corresponding path program 5 times [2021-05-06 08:08:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:09,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777324660] [2021-05-06 08:08:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:09,915 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:09,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771596378] [2021-05-06 08:08:09,915 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 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 08:08:10,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:08:10,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:08:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 08:08:10,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:10,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777324660] [2021-05-06 08:08:10,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:10,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771596378] [2021-05-06 08:08:10,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771596378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:10,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:10,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:08:10,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340112741] [2021-05-06 08:08:10,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:08:10,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:08:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:10,540 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 08:08:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:10,603 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-05-06 08:08:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:08:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 80 [2021-05-06 08:08:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:10,605 INFO L225 Difference]: With dead ends: 264 [2021-05-06 08:08:10,605 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 08:08:10,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:08:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 08:08:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 08:08:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:08:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 08:08:10,612 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 08:08:10,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:10,612 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 08:08:10,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 08:08:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 08:08:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:08:10,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:10,613 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:10,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:10,822 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1563427147, now seen corresponding path program 6 times [2021-05-06 08:08:10,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:10,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232441261] [2021-05-06 08:08:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:10,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:10,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125715251] [2021-05-06 08:08:10,839 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 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 08:08:10,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:08:10,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:08:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 08:08:11,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:11,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232441261] [2021-05-06 08:08:11,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:11,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125715251] [2021-05-06 08:08:11,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125715251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:11,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:11,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:08:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156975974] [2021-05-06 08:08:11,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:08:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:08:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:08:11,111 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:08:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:11,184 INFO L93 Difference]: Finished difference Result 254 states and 310 transitions. [2021-05-06 08:08:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:08:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 08:08:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:11,188 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:08:11,188 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 08:08:11,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:08:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 08:08:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 08:08:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:08:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 08:08:11,194 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 08:08:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:11,194 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 08:08:11,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:08:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 08:08:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:08:11,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:11,195 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:11,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:11,420 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:11,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1072579442, now seen corresponding path program 3 times [2021-05-06 08:08:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:11,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761452149] [2021-05-06 08:08:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:11,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:11,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167316373] [2021-05-06 08:08:11,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:11,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:08:11,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:08:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:11,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:08:11,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:11,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761452149] [2021-05-06 08:08:11,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:11,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167316373] [2021-05-06 08:08:11,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167316373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:11,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:11,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:08:11,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688198095] [2021-05-06 08:08:11,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:08:11,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:11,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:08:11,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:11,731 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:08:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:11,987 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-05-06 08:08:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:08:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:08:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:11,989 INFO L225 Difference]: With dead ends: 284 [2021-05-06 08:08:11,989 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 08:08:11,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:08:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 08:08:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 08:08:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:08:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 08:08:11,996 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 08:08:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:11,997 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 08:08:11,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:08:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 08:08:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:08:11,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:11,998 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:12,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:08:12,217 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash -721779505, now seen corresponding path program 7 times [2021-05-06 08:08:12,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:12,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805262735] [2021-05-06 08:08:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:12,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:12,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825161289] [2021-05-06 08:08:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:08:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 08:08:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:08:12,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:12,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805262735] [2021-05-06 08:08:12,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825161289] [2021-05-06 08:08:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825161289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:12,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:12,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:08:12,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918344078] [2021-05-06 08:08:12,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:08:12,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:12,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:08:12,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:08:12,712 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:08:13,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:13,679 INFO L93 Difference]: Finished difference Result 306 states and 374 transitions. [2021-05-06 08:08:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:08:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:08:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:13,707 INFO L225 Difference]: With dead ends: 306 [2021-05-06 08:08:13,707 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 08:08:13,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:08:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 08:08:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 08:08:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:08:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 08:08:13,715 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 08:08:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:13,715 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 08:08:13,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:08:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 08:08:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:08:13,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:13,716 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:13,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:08:13,943 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:13,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1313119571, now seen corresponding path program 8 times [2021-05-06 08:08:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802019891] [2021-05-06 08:08:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:13,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:13,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092592251] [2021-05-06 08:08:13,949 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 08:08:14,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:14,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:08:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:14,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:14,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:14,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 08:08:14,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802019891] [2021-05-06 08:08:14,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092592251] [2021-05-06 08:08:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092592251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:14,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:14,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:08:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788979956] [2021-05-06 08:08:14,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:08:14,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:14,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:08:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:14,262 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:08:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:14,862 INFO L93 Difference]: Finished difference Result 328 states and 404 transitions. [2021-05-06 08:08:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:08:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:08:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:14,864 INFO L225 Difference]: With dead ends: 328 [2021-05-06 08:08:14,864 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 08:08:14,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:08:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 08:08:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 08:08:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 08:08:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 08:08:14,873 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 08:08:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:14,874 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 08:08:14,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:08:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 08:08:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:08:14,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:14,875 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:15,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:15,089 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:15,089 INFO L82 PathProgramCache]: Analyzing trace with hash -962319634, now seen corresponding path program 9 times [2021-05-06 08:08:15,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:15,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151195435] [2021-05-06 08:08:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:15,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:15,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849741863] [2021-05-06 08:08:15,127 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 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 08:08:15,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:08:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:15,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:08:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:15,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 08:08:15,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:15,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151195435] [2021-05-06 08:08:15,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849741863] [2021-05-06 08:08:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849741863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:15,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:15,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:08:15,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311561307] [2021-05-06 08:08:15,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:08:15,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:15,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:08:15,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:15,417 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:08:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:15,888 INFO L93 Difference]: Finished difference Result 344 states and 439 transitions. [2021-05-06 08:08:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:08:15,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 08:08:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:15,890 INFO L225 Difference]: With dead ends: 344 [2021-05-06 08:08:15,890 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:08:15,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:08:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:08:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 08:08:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:08:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 08:08:15,899 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 08:08:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:15,899 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 08:08:15,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:08:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 08:08:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:08:15,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:15,900 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:16,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:08:16,101 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -201025847, now seen corresponding path program 10 times [2021-05-06 08:08:16,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:16,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555523806] [2021-05-06 08:08:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:16,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:16,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60522206] [2021-05-06 08:08:16,107 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 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 08:08:16,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:08:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:08:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:08:16,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:16,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555523806] [2021-05-06 08:08:16,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:16,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60522206] [2021-05-06 08:08:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60522206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:16,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:16,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:08:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400863093] [2021-05-06 08:08:16,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:08:16,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:08:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:08:16,463 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:08:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:16,670 INFO L93 Difference]: Finished difference Result 323 states and 407 transitions. [2021-05-06 08:08:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:08:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:08:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:16,672 INFO L225 Difference]: With dead ends: 323 [2021-05-06 08:08:16,672 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:08:16,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:08:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 08:08:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 08:08:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 08:08:16,681 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 08:08:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:16,681 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 08:08:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:08:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 08:08:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:08:16,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:16,683 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:16,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:16,909 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1749274408, now seen corresponding path program 11 times [2021-05-06 08:08:16,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:16,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219994556] [2021-05-06 08:08:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:16,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:16,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443397742] [2021-05-06 08:08:16,917 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 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 08:08:18,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:08:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:08:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:18,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:08:18,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219994556] [2021-05-06 08:08:18,641 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443397742] [2021-05-06 08:08:18,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443397742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:18,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:18,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:08:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389356378] [2021-05-06 08:08:18,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:08:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:08:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:08:18,643 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:08:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:19,384 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-06 08:08:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:08:19,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:08:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:19,387 INFO L225 Difference]: With dead ends: 357 [2021-05-06 08:08:19,387 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 08:08:19,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 08:08:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 08:08:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:08:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 08:08:19,395 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 08:08:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:19,395 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 08:08:19,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:08:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 08:08:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:08:19,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:19,396 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:19,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:08:19,620 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash 492366858, now seen corresponding path program 12 times [2021-05-06 08:08:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:19,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541758084] [2021-05-06 08:08:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:19,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:19,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261768443] [2021-05-06 08:08:19,627 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 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 08:08:19,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:08:19,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:19,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:08:19,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:19,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:19,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:22,797 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 08:08:22,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:22,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 08:08:22,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541758084] [2021-05-06 08:08:22,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261768443] [2021-05-06 08:08:22,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261768443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:22,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:22,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:08:22,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45888638] [2021-05-06 08:08:22,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:08:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:08:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:08:22,827 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:09:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:04,443 INFO L93 Difference]: Finished difference Result 399 states and 510 transitions. [2021-05-06 08:09:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:09:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 08:09:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:04,445 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:09:04,445 INFO L226 Difference]: Without dead ends: 387 [2021-05-06 08:09:04,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2946.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:09:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-06 08:09:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 374. [2021-05-06 08:09:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.188034188034188) internal successors, (278), 243 states have internal predecessors, (278), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 08:09:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 468 transitions. [2021-05-06 08:09:04,454 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 468 transitions. Word has length 90 [2021-05-06 08:09:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:04,454 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 468 transitions. [2021-05-06 08:09:04,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:09:04,454 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 468 transitions. [2021-05-06 08:09:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:09:04,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:04,455 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:04,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:09:04,656 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 4 times [2021-05-06 08:09:04,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:04,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133695489] [2021-05-06 08:09:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:04,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:04,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719408663] [2021-05-06 08:09:04,666 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 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 08:09:04,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:09:04,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:09:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:04,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:09:04,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:04,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133695489] [2021-05-06 08:09:04,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:04,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719408663] [2021-05-06 08:09:04,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719408663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:04,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:04,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:09:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789127480] [2021-05-06 08:09:04,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:09:04,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:09:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:09:04,911 INFO L87 Difference]: Start difference. First operand 374 states and 468 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:09:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:04,990 INFO L93 Difference]: Finished difference Result 460 states and 547 transitions. [2021-05-06 08:09:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:09:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 08:09:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:04,992 INFO L225 Difference]: With dead ends: 460 [2021-05-06 08:09:04,993 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 08:09:04,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:09:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 08:09:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 08:09:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1428571428571428) internal successors, (320), 290 states have internal predecessors, (320), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 08:09:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 510 transitions. [2021-05-06 08:09:05,002 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 510 transitions. Word has length 99 [2021-05-06 08:09:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:05,003 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 510 transitions. [2021-05-06 08:09:05,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:09:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 510 transitions. [2021-05-06 08:09:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:05,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:05,004 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:05,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:09:05,228 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1826743324, now seen corresponding path program 4 times [2021-05-06 08:09:05,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:05,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139078339] [2021-05-06 08:09:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:05,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:05,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131436417] [2021-05-06 08:09:05,233 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 08:09:05,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:09:05,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:05,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:09:05,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:05,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 08:09:05,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139078339] [2021-05-06 08:09:05,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131436417] [2021-05-06 08:09:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131436417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:05,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:05,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:09:05,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411246428] [2021-05-06 08:09:05,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:09:05,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:09:05,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:09:05,846 INFO L87 Difference]: Start difference. First operand 432 states and 510 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:09:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:07,292 INFO L93 Difference]: Finished difference Result 467 states and 566 transitions. [2021-05-06 08:09:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:09:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 08:09:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:07,294 INFO L225 Difference]: With dead ends: 467 [2021-05-06 08:09:07,294 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 08:09:07,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:09:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 08:09:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 08:09:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.146341463414634) internal successors, (329), 297 states have internal predecessors, (329), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 08:09:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 525 transitions. [2021-05-06 08:09:07,304 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 525 transitions. Word has length 104 [2021-05-06 08:09:07,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:07,304 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 525 transitions. [2021-05-06 08:09:07,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:09:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 525 transitions. [2021-05-06 08:09:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:07,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:07,306 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:07,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:09:07,522 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2117424035, now seen corresponding path program 13 times [2021-05-06 08:09:07,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:07,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905859466] [2021-05-06 08:09:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:07,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:07,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328966062] [2021-05-06 08:09:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:09:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:09:07,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:09:07,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:07,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 08:09:07,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:07,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905859466] [2021-05-06 08:09:07,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:07,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328966062] [2021-05-06 08:09:07,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328966062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:07,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:07,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:09:07,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377069765] [2021-05-06 08:09:07,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:09:07,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:07,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:09:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:09:07,942 INFO L87 Difference]: Start difference. First operand 443 states and 525 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:09:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:08,345 INFO L93 Difference]: Finished difference Result 470 states and 564 transitions. [2021-05-06 08:09:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:09:08,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 08:09:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:08,348 INFO L225 Difference]: With dead ends: 470 [2021-05-06 08:09:08,348 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 08:09:08,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:09:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 08:09:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 08:09:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1462585034013606) internal successors, (337), 304 states have internal predecessors, (337), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:09:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 539 transitions. [2021-05-06 08:09:08,357 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 539 transitions. Word has length 104 [2021-05-06 08:09:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:08,358 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 539 transitions. [2021-05-06 08:09:08,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:09:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 539 transitions. [2021-05-06 08:09:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:08,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:08,359 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:08,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:09:08,572 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1586203195, now seen corresponding path program 14 times [2021-05-06 08:09:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461671171] [2021-05-06 08:09:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:08,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:08,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97030691] [2021-05-06 08:09:08,581 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:09:08,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:09:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:08,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:09:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:08,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 08:09:08,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461671171] [2021-05-06 08:09:08,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97030691] [2021-05-06 08:09:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97030691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:08,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:08,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:09:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732780101] [2021-05-06 08:09:08,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:09:08,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:09:08,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:09:08,924 INFO L87 Difference]: Start difference. First operand 454 states and 539 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 08:09:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:09,585 INFO L93 Difference]: Finished difference Result 495 states and 590 transitions. [2021-05-06 08:09:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:09:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 104 [2021-05-06 08:09:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:09,588 INFO L225 Difference]: With dead ends: 495 [2021-05-06 08:09:09,588 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 08:09:09,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:09:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 08:09:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 08:09:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1466666666666667) internal successors, (344), 308 states have internal predecessors, (344), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 08:09:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 542 transitions. [2021-05-06 08:09:09,596 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 542 transitions. Word has length 104 [2021-05-06 08:09:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:09,597 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 542 transitions. [2021-05-06 08:09:09,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 08:09:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 542 transitions. [2021-05-06 08:09:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:09,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:09,598 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:09,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:09:09,822 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1937003132, now seen corresponding path program 15 times [2021-05-06 08:09:09,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:09,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823399197] [2021-05-06 08:09:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:09,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:09,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204814773] [2021-05-06 08:09:09,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:09:10,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:09:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:09:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:10,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,866 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:09:11,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:11,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:36,968 WARN L205 SmtUtils]: Spent 8.58 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 08:09:37,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:38,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 90 proven. 56 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-05-06 08:09:38,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:38,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823399197] [2021-05-06 08:09:38,402 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:38,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204814773] [2021-05-06 08:09:38,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204814773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:38,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:38,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:09:38,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441360316] [2021-05-06 08:09:38,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:09:38,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:38,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:09:38,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:09:38,403 INFO L87 Difference]: Start difference. First operand 460 states and 542 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:09:59,366 WARN L205 SmtUtils]: Spent 19.06 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-06 08:10:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:15,166 INFO L93 Difference]: Finished difference Result 568 states and 719 transitions. [2021-05-06 08:10:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:10:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 104 [2021-05-06 08:10:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:15,169 INFO L225 Difference]: With dead ends: 568 [2021-05-06 08:10:15,170 INFO L226 Difference]: Without dead ends: 564 [2021-05-06 08:10:15,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 47933.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:10:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-05-06 08:10:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 503. [2021-05-06 08:10:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 327 states have (on average 1.1590214067278288) internal successors, (379), 337 states have internal predecessors, (379), 114 states have call successors, (114), 62 states have call predecessors, (114), 61 states have return successors, (110), 103 states have call predecessors, (110), 110 states have call successors, (110) [2021-05-06 08:10:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 603 transitions. [2021-05-06 08:10:15,182 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 603 transitions. Word has length 104 [2021-05-06 08:10:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:15,183 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 603 transitions. [2021-05-06 08:10:15,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:10:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 603 transitions. [2021-05-06 08:10:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:10:15,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:15,184 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:10:15,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:10:15,392 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1580430237, now seen corresponding path program 16 times [2021-05-06 08:10:15,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:15,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712869632] [2021-05-06 08:10:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:15,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:15,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094584896] [2021-05-06 08:10:15,406 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:15,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:10:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:10:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:15,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:15,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 72 proven. 78 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 08:10:16,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712869632] [2021-05-06 08:10:16,470 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094584896] [2021-05-06 08:10:16,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094584896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:16,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:16,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:10:16,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355470495] [2021-05-06 08:10:16,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:10:16,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:16,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:10:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:10:16,472 INFO L87 Difference]: Start difference. First operand 503 states and 603 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:10:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:17,942 INFO L93 Difference]: Finished difference Result 530 states and 642 transitions. [2021-05-06 08:10:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:10:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 08:10:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:17,945 INFO L225 Difference]: With dead ends: 530 [2021-05-06 08:10:17,945 INFO L226 Difference]: Without dead ends: 530 [2021-05-06 08:10:17,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:10:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-06 08:10:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 496. [2021-05-06 08:10:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 322 states have (on average 1.1583850931677018) internal successors, (373), 333 states have internal predecessors, (373), 113 states have call successors, (113), 61 states have call predecessors, (113), 60 states have return successors, (109), 101 states have call predecessors, (109), 109 states have call successors, (109) [2021-05-06 08:10:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 595 transitions. [2021-05-06 08:10:17,956 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 595 transitions. Word has length 104 [2021-05-06 08:10:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:17,956 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 595 transitions. [2021-05-06 08:10:17,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:10:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 595 transitions. [2021-05-06 08:10:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:10:17,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:17,957 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:10:18,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:10:18,177 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1931230174, now seen corresponding path program 17 times [2021-05-06 08:10:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:18,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958724040] [2021-05-06 08:10:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:18,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:18,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214869465] [2021-05-06 08:10:18,183 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:18,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 08:10:18,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:10:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:18,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:18,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:20,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:21,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:22,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:28,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:29,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,843 WARN L159 QuantifierPusher]: Ignoring assumption.