/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:16:42,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:16:42,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:16:42,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:16:42,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:16:42,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:16:42,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:16:42,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:16:42,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:16:42,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:16:42,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:16:42,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:16:42,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:16:42,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:16:42,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:16:42,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:16:42,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:16:42,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:16:42,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:16:42,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:16:42,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:16:42,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:16:42,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:16:42,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:16:42,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:16:42,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:16:42,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:16:42,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:16:42,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:16:42,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:16:42,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:16:42,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:16:42,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:16:42,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:16:42,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:16:42,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:16:42,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:16:42,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:16:42,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:16:42,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:16:42,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:16:42,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:16:42,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:16:42,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:16:42,339 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:16:42,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:16:42,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:16:42,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:16:42,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:16:42,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:16:42,584 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:16:42,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-02 20:16:42,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03253ce4/551ffea44a7c46bb8deecdda3b8cbd0e/FLAG38b5ee3c0 [2021-05-02 20:16:42,973 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:16:42,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-02 20:16:42,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03253ce4/551ffea44a7c46bb8deecdda3b8cbd0e/FLAG38b5ee3c0 [2021-05-02 20:16:42,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03253ce4/551ffea44a7c46bb8deecdda3b8cbd0e [2021-05-02 20:16:42,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:16:42,996 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:16:42,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:16:42,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:16:43,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:16:43,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:16:42" (1/1) ... [2021-05-02 20:16:43,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac80d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43, skipping insertion in model container [2021-05-02 20:16:43,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:16:42" (1/1) ... [2021-05-02 20:16:43,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:16:43,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:16:43,109 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_unwindbound10.c[489,502] [2021-05-02 20:16:43,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:16:43,126 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:16:43,133 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_unwindbound10.c[489,502] [2021-05-02 20:16:43,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:16:43,187 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:16:43,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43 WrapperNode [2021-05-02 20:16:43,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:16:43,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:16:43,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:16:43,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:16:43,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:16:43,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:16:43,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:16:43,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:16:43,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (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 [2021-05-02 20:16:43,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:16:43,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:16:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:16:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:16:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:16:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:16:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:16:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:16:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:16:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:16:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:16:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:16:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:16:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:16:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:16:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:16:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:16:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:16:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:16:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:16:43,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:16:43,411 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:16:43,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:16:43 BoogieIcfgContainer [2021-05-02 20:16:43,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:16:43,412 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:16:43,413 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:16:43,413 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:16:43,415 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:16:43" (1/1) ... [2021-05-02 20:16:43,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:16:43 BasicIcfg [2021-05-02 20:16:43,443 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:16:43,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:16:43,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:16:43,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:16:43,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:16:42" (1/4) ... [2021-05-02 20:16:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef68674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:16:43, skipping insertion in model container [2021-05-02 20:16:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:16:43" (2/4) ... [2021-05-02 20:16:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef68674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:16:43, skipping insertion in model container [2021-05-02 20:16:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:16:43" (3/4) ... [2021-05-02 20:16:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef68674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:16:43, skipping insertion in model container [2021-05-02 20:16:43,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:16:43" (4/4) ... [2021-05-02 20:16:43,448 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.cJordan [2021-05-02 20:16:43,451 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:16:43,454 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:16:43,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:16:43,483 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:16:43,484 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:16:43,484 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:16:43,484 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:16:43,484 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:16:43,484 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:16:43,484 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:16:43,484 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:16:43,492 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) [2021-05-02 20:16:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:16:43,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:43,497 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:16:43,497 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-02 20:16:43,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:43,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513608578] [2021-05-02 20:16:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:16:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:16:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:16:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:16:43,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:43,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513608578] [2021-05-02 20:16:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513608578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:16:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867335431] [2021-05-02 20:16:43,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:16:43,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:16:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:16:43,742 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) [2021-05-02 20:16:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:43,815 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-02 20:16:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:16:43,816 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 [2021-05-02 20:16:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:43,821 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:16:43,821 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:16:43,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:16:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:16:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 20:16:43,841 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) [2021-05-02 20:16:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 20:16:43,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 20:16:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:43,843 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 20:16:43,843 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) [2021-05-02 20:16:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 20:16:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:16:43,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:43,844 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] [2021-05-02 20:16:43,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:16:43,845 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-02 20:16:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865337191] [2021-05-02 20:16:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:16:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:16:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:16:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:16:43,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:43,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865337191] [2021-05-02 20:16:43,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865337191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:43,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:43,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:16:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110891029] [2021-05-02 20:16:43,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:16:43,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:43,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:16:43,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:16:43,972 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) [2021-05-02 20:16:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:44,074 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-02 20:16:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:16:44,075 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 [2021-05-02 20:16:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:44,076 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:16:44,076 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:16:44,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:16:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:16:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:16:44,085 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) [2021-05-02 20:16:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 20:16:44,088 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 20:16:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:44,089 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 20:16:44,090 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) [2021-05-02 20:16:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 20:16:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:16:44,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:44,093 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] [2021-05-02 20:16:44,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:16:44,097 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-02 20:16:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:44,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148681160] [2021-05-02 20:16:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:44,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:44,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593408782] [2021-05-02 20:16:44,113 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 [2021-05-02 20:16:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:44,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:16:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:16:44,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:44,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148681160] [2021-05-02 20:16:44,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:44,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593408782] [2021-05-02 20:16:44,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593408782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:44,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:44,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:16:44,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403614186] [2021-05-02 20:16:44,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:16:44,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:44,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:16:44,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:16:44,288 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:16:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:44,356 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-02 20:16:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:16:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 20:16:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:44,357 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:16:44,357 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:16:44,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:16:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 20:16:44,361 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) [2021-05-02 20:16:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 20:16:44,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 20:16:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:44,363 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 20:16:44,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:16:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 20:16:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:16:44,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:44,363 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] [2021-05-02 20:16:44,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:16:44,585 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:44,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-02 20:16:44,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:44,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796545098] [2021-05-02 20:16:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:44,592 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:44,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812450108] [2021-05-02 20:16:44,592 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 [2021-05-02 20:16:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:44,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:16:44,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:44,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:16:44,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:44,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796545098] [2021-05-02 20:16:44,774 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:44,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812450108] [2021-05-02 20:16:44,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812450108] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:44,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:44,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:16:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099076460] [2021-05-02 20:16:44,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:44,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:44,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:44,775 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:16:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:44,877 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-02 20:16:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:16:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:44,880 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:16:44,880 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:16:44,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:16:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 20:16:44,897 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) [2021-05-02 20:16:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 20:16:44,899 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 20:16:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:44,899 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 20:16:44,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:16:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 20:16:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:16:44,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:44,901 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] [2021-05-02 20:16:45,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:45,116 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-02 20:16:45,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:45,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152767685] [2021-05-02 20:16:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:45,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:45,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516405048] [2021-05-02 20:16:45,124 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 [2021-05-02 20:16:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:16:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:45,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:16:45,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152767685] [2021-05-02 20:16:45,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:45,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516405048] [2021-05-02 20:16:45,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516405048] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:45,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:45,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:16:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179341919] [2021-05-02 20:16:45,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:45,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:45,305 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:16:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:45,394 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-02 20:16:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 20:16:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:45,395 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:16:45,396 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:16:45,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:16:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:16:45,399 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) [2021-05-02 20:16:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 20:16:45,400 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 20:16:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:45,400 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 20:16:45,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:16:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 20:16:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:16:45,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:45,401 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] [2021-05-02 20:16:45,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:45,616 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-02 20:16:45,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:45,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788067755] [2021-05-02 20:16:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:45,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:45,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905813174] [2021-05-02 20:16:45,624 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 [2021-05-02 20:16:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:16:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:16:45,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:45,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788067755] [2021-05-02 20:16:45,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:45,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905813174] [2021-05-02 20:16:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905813174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:16:45,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:16:45,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:16:45,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44343254] [2021-05-02 20:16:45,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:16:45,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:45,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:16:45,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:16:45,746 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) [2021-05-02 20:16:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:45,777 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-02 20:16:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:16:45,777 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 [2021-05-02 20:16:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:45,781 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:16:45,781 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:16:45,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:16:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:16:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 20:16:45,793 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) [2021-05-02 20:16:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 20:16:45,794 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 20:16:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:45,794 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 20:16:45,794 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) [2021-05-02 20:16:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 20:16:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:16:45,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:45,795 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] [2021-05-02 20:16:46,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:46,010 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:46,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-02 20:16:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:46,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796056968] [2021-05-02 20:16:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:46,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:46,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393867543] [2021-05-02 20:16:46,026 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 [2021-05-02 20:16:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:16:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:16:46,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:46,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796056968] [2021-05-02 20:16:46,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:46,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393867543] [2021-05-02 20:16:46,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393867543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:46,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:46,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:16:46,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022109411] [2021-05-02 20:16:46,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:16:46,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:16:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:16:46,183 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) [2021-05-02 20:16:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:46,228 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-02 20:16:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:16:46,229 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 [2021-05-02 20:16:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:46,229 INFO L225 Difference]: With dead ends: 99 [2021-05-02 20:16:46,229 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 20:16:46,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:16:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 20:16:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 20:16:46,244 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) [2021-05-02 20:16:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-02 20:16:46,245 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-02 20:16:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:46,246 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-02 20:16:46,246 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) [2021-05-02 20:16:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-02 20:16:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:16:46,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:46,246 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] [2021-05-02 20:16:46,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 20:16:46,447 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-02 20:16:46,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:46,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416571854] [2021-05-02 20:16:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:46,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:46,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096375706] [2021-05-02 20:16:46,454 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 [2021-05-02 20:16:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:46,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:16:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:46,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:16:46,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:46,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416571854] [2021-05-02 20:16:46,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096375706] [2021-05-02 20:16:46,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096375706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:46,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:46,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:16:46,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135841903] [2021-05-02 20:16:46,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:16:46,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:46,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:16:46,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:16:46,628 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:16:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:46,705 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-02 20:16:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:16:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-02 20:16:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:46,707 INFO L225 Difference]: With dead ends: 104 [2021-05-02 20:16:46,707 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 20:16:46,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 20:16:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 20:16:46,710 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) [2021-05-02 20:16:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-02 20:16:46,711 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-02 20:16:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:46,711 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-02 20:16:46,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:16:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-02 20:16:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:16:46,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:46,712 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] [2021-05-02 20:16:46,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:46,921 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-02 20:16:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:46,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171222597] [2021-05-02 20:16:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:46,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:46,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285378310] [2021-05-02 20:16:46,927 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 [2021-05-02 20:16:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:46,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:16:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:16:47,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171222597] [2021-05-02 20:16:47,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285378310] [2021-05-02 20:16:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285378310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:47,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:47,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:16:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304178275] [2021-05-02 20:16:47,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:47,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:47,088 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 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) [2021-05-02 20:16:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:47,200 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:16:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 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 [2021-05-02 20:16:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:47,201 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:16:47,201 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 20:16:47,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 20:16:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-02 20:16:47,205 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) [2021-05-02 20:16:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-02 20:16:47,216 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-02 20:16:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:47,216 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-02 20:16:47,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 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) [2021-05-02 20:16:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-02 20:16:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:16:47,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:47,217 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] [2021-05-02 20:16:47,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:47,425 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-02 20:16:47,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:47,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549163802] [2021-05-02 20:16:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:47,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:47,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771393051] [2021-05-02 20:16:47,431 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 [2021-05-02 20:16:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:16:47,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:47,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:16:47,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:47,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549163802] [2021-05-02 20:16:47,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:47,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771393051] [2021-05-02 20:16:47,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771393051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:47,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:47,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:16:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678659007] [2021-05-02 20:16:47,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:16:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:47,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:16:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:47,638 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:16:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:47,804 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-02 20:16:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:16:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:16:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:47,806 INFO L225 Difference]: With dead ends: 129 [2021-05-02 20:16:47,806 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 20:16:47,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:16:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 20:16:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-02 20:16:47,810 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) [2021-05-02 20:16:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-02 20:16:47,810 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-02 20:16:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:47,810 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-02 20:16:47,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:16:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-02 20:16:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:16:47,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:47,811 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] [2021-05-02 20:16:48,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:16:48,021 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:48,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-02 20:16:48,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:48,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554677387] [2021-05-02 20:16:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:48,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:48,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663629836] [2021-05-02 20:16:48,027 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 [2021-05-02 20:16:48,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:16:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:16:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:48,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 20:16:48,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:48,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554677387] [2021-05-02 20:16:48,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:48,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663629836] [2021-05-02 20:16:48,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663629836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:48,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:48,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:16:48,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912038694] [2021-05-02 20:16:48,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:48,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:48,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:48,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:48,242 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:16:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:48,355 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-02 20:16:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:48,356 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), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 20:16:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:48,357 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:16:48,357 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:16:48,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:16:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:16:48,361 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) [2021-05-02 20:16:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-02 20:16:48,362 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-02 20:16:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:48,362 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-02 20:16:48,362 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), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:16:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-02 20:16:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:16:48,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:48,363 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] [2021-05-02 20:16:48,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:48,577 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-02 20:16:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:48,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121912239] [2021-05-02 20:16:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:48,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:48,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504265388] [2021-05-02 20:16:48,583 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 [2021-05-02 20:16:48,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:16:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:16:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:48,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:16:48,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:48,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121912239] [2021-05-02 20:16:48,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:48,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504265388] [2021-05-02 20:16:48,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504265388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:48,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:48,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:16:48,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267283389] [2021-05-02 20:16:48,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:16:48,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:48,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:16:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:16:48,734 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) [2021-05-02 20:16:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:48,776 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-05-02 20:16:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:16:48,777 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 [2021-05-02 20:16:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:48,778 INFO L225 Difference]: With dead ends: 173 [2021-05-02 20:16:48,778 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 20:16:48,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:16:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 20:16:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 20:16:48,782 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) [2021-05-02 20:16:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-02 20:16:48,783 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-02 20:16:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:48,784 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-02 20:16:48,784 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) [2021-05-02 20:16:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-02 20:16:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:16:48,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:48,785 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] [2021-05-02 20:16:48,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:48,998 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:48,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2021-05-02 20:16:48,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:48,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119805291] [2021-05-02 20:16:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:49,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:49,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524900375] [2021-05-02 20:16:49,004 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 [2021-05-02 20:16:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:16:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:16:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:16:49,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:49,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119805291] [2021-05-02 20:16:49,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:49,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524900375] [2021-05-02 20:16:49,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524900375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:49,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:49,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:16:49,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553852747] [2021-05-02 20:16:49,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:16:49,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:49,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:16:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:16:49,262 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:16:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:49,414 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2021-05-02 20:16:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:16:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:16:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:49,415 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:16:49,415 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 20:16:49,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:16:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 20:16:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-02 20:16:49,419 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) [2021-05-02 20:16:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 20:16:49,420 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-02 20:16:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:49,420 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 20:16:49,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:16:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 20:16:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:16:49,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:49,421 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] [2021-05-02 20:16:49,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:16:49,633 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1121480771, now seen corresponding path program 2 times [2021-05-02 20:16:49,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:49,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278738073] [2021-05-02 20:16:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:49,639 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:49,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250949542] [2021-05-02 20:16:49,639 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 [2021-05-02 20:16:49,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:16:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:16:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:16:49,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278738073] [2021-05-02 20:16:49,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250949542] [2021-05-02 20:16:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250949542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:49,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:49,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:16:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194785986] [2021-05-02 20:16:49,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:16:49,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:16:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:50,000 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:16:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:50,240 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-05-02 20:16:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:16:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:16:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:50,242 INFO L225 Difference]: With dead ends: 196 [2021-05-02 20:16:50,242 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 20:16:50,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:16:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 20:16:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 20:16:50,250 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) [2021-05-02 20:16:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-02 20:16:50,251 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-02 20:16:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:50,251 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-02 20:16:50,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:16:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-02 20:16:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 20:16:50,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:50,252 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] [2021-05-02 20:16:50,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:16:50,467 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash -718576292, now seen corresponding path program 2 times [2021-05-02 20:16:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:50,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958703632] [2021-05-02 20:16:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:50,477 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:50,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269123333] [2021-05-02 20:16:50,477 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 [2021-05-02 20:16:50,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:16:50,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:16:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:50,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:16:50,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958703632] [2021-05-02 20:16:50,803 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269123333] [2021-05-02 20:16:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269123333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:50,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:50,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:16:50,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474101647] [2021-05-02 20:16:50,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:16:50,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:16:50,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:16:50,804 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:16:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:51,178 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2021-05-02 20:16:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:16:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2021-05-02 20:16:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:51,184 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:16:51,184 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 20:16:51,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:16:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 20:16:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-02 20:16:51,195 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) [2021-05-02 20:16:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-02 20:16:51,196 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-02 20:16:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:51,196 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-02 20:16:51,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:16:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-02 20:16:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 20:16:51,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:51,197 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] [2021-05-02 20:16:51,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:16:51,428 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash -367776355, now seen corresponding path program 3 times [2021-05-02 20:16:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:51,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029880568] [2021-05-02 20:16:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:51,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:51,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683047227] [2021-05-02 20:16:51,434 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 [2021-05-02 20:16:51,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:16:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:16:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:51,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:16:51,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029880568] [2021-05-02 20:16:51,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683047227] [2021-05-02 20:16:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683047227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:51,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:16:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355877872] [2021-05-02 20:16:51,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:51,735 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:16:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:51,919 INFO L93 Difference]: Finished difference Result 233 states and 300 transitions. [2021-05-02 20:16:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-02 20:16:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:51,921 INFO L225 Difference]: With dead ends: 233 [2021-05-02 20:16:51,921 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 20:16:51,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 20:16:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-02 20:16:51,925 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) [2021-05-02 20:16:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-02 20:16:51,926 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-02 20:16:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:51,926 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-02 20:16:51,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:16:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-02 20:16:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 20:16:51,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:51,927 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] [2021-05-02 20:16:52,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:16:52,154 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash 876232379, now seen corresponding path program 4 times [2021-05-02 20:16:52,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:52,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540589332] [2021-05-02 20:16:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:52,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:52,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909392612] [2021-05-02 20:16:52,159 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 [2021-05-02 20:16:52,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:16:52,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:16:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:52,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:16:52,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540589332] [2021-05-02 20:16:52,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909392612] [2021-05-02 20:16:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909392612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:52,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:52,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:16:52,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064194586] [2021-05-02 20:16:52,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:16:52,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:16:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:16:52,786 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:16:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:53,141 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2021-05-02 20:16:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:16:53,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-02 20:16:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:53,143 INFO L225 Difference]: With dead ends: 240 [2021-05-02 20:16:53,143 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 20:16:53,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:16:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 20:16:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-02 20:16:53,157 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) [2021-05-02 20:16:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-02 20:16:53,157 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-02 20:16:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:53,158 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-02 20:16:53,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:16:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-02 20:16:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 20:16:53,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:53,158 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] [2021-05-02 20:16:53,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:16:53,377 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:53,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:53,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1468434662, now seen corresponding path program 3 times [2021-05-02 20:16:53,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:53,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955764914] [2021-05-02 20:16:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:53,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:53,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411130813] [2021-05-02 20:16:53,382 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 [2021-05-02 20:16:53,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:16:53,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:16:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:53,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 20:16:53,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955764914] [2021-05-02 20:16:53,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411130813] [2021-05-02 20:16:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411130813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:53,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:53,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:16:53,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332483612] [2021-05-02 20:16:53,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:16:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:16:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:16:53,851 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 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) [2021-05-02 20:16:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:54,067 INFO L93 Difference]: Finished difference Result 218 states and 283 transitions. [2021-05-02 20:16:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:16:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 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 [2021-05-02 20:16:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:54,069 INFO L225 Difference]: With dead ends: 218 [2021-05-02 20:16:54,069 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 20:16:54,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:16:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 20:16:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2021-05-02 20:16:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 133 states have internal predecessors, (149), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 20:16:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 265 transitions. [2021-05-02 20:16:54,077 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 265 transitions. Word has length 71 [2021-05-02 20:16:54,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:54,079 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 265 transitions. [2021-05-02 20:16:54,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 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) [2021-05-02 20:16:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 265 transitions. [2021-05-02 20:16:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:16:54,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:54,079 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] [2021-05-02 20:16:54,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:16:54,295 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1531334864, now seen corresponding path program 3 times [2021-05-02 20:16:54,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:54,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355769537] [2021-05-02 20:16:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:54,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:54,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81146237] [2021-05-02 20:16:54,302 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 [2021-05-02 20:16:54,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:16:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:16:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:16:54,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:54,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355769537] [2021-05-02 20:16:54,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:54,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81146237] [2021-05-02 20:16:54,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81146237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:54,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:54,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:16:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237175493] [2021-05-02 20:16:54,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:16:54,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:16:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:16:54,639 INFO L87 Difference]: Start difference. First operand 209 states and 265 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) [2021-05-02 20:16:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:54,693 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2021-05-02 20:16:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:16:54,694 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 [2021-05-02 20:16:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:54,695 INFO L225 Difference]: With dead ends: 243 [2021-05-02 20:16:54,695 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 20:16:54,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:16:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 20:16:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-02 20:16:54,699 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) [2021-05-02 20:16:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-02 20:16:54,700 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-02 20:16:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:54,700 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-02 20:16:54,700 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) [2021-05-02 20:16:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-02 20:16:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:16:54,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:54,701 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] [2021-05-02 20:16:54,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:16:54,917 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1875056275, now seen corresponding path program 5 times [2021-05-02 20:16:54,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:54,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529277354] [2021-05-02 20:16:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:54,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:54,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359242453] [2021-05-02 20:16:54,922 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 [2021-05-02 20:16:56,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:16:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:16:56,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 20:16:56,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529277354] [2021-05-02 20:16:56,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359242453] [2021-05-02 20:16:56,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359242453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:56,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:56,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:16:56,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543437971] [2021-05-02 20:16:56,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:16:56,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:16:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:16:56,358 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:16:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:16:56,478 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-05-02 20:16:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:16:56,479 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 20:16:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:16:56,480 INFO L225 Difference]: With dead ends: 264 [2021-05-02 20:16:56,480 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 20:16:56,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:16:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 20:16:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-02 20:16:56,486 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) [2021-05-02 20:16:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-02 20:16:56,487 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-02 20:16:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:16:56,489 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-02 20:16:56,489 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:16:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-02 20:16:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:16:56,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:16:56,489 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] [2021-05-02 20:16:56,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 20:16:56,697 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:16:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:16:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1563427147, now seen corresponding path program 6 times [2021-05-02 20:16:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:16:56,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003153187] [2021-05-02 20:16:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:16:56,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:16:56,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126287558] [2021-05-02 20:16:56,702 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 [2021-05-02 20:16:56,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 20:16:56,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:16:56,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:16:56,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:16:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:56,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:56,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 20:16:57,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:16:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003153187] [2021-05-02 20:16:57,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:16:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126287558] [2021-05-02 20:16:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126287558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:16:57,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:16:57,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:16:57,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114747820] [2021-05-02 20:16:57,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:16:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:16:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:16:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:16:57,179 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:17:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:01,817 INFO L93 Difference]: Finished difference Result 296 states and 371 transitions. [2021-05-02 20:17:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:17:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 20:17:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:01,819 INFO L225 Difference]: With dead ends: 296 [2021-05-02 20:17:01,819 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 20:17:01,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:17:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 20:17:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 281. [2021-05-02 20:17:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 182 states have internal predecessors, (199), 76 states have call successors, (76), 34 states have call predecessors, (76), 33 states have return successors, (72), 64 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:17:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 347 transitions. [2021-05-02 20:17:01,826 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 347 transitions. Word has length 80 [2021-05-02 20:17:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:01,826 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 347 transitions. [2021-05-02 20:17:01,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:17:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 347 transitions. [2021-05-02 20:17:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:17:01,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:01,829 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] [2021-05-02 20:17:02,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:17:02,045 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1844036468, now seen corresponding path program 7 times [2021-05-02 20:17:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:02,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202314458] [2021-05-02 20:17:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:02,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:02,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108711867] [2021-05-02 20:17:02,051 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 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 [2021-05-02 20:17:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:17:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:02,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 20:17:02,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:02,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202314458] [2021-05-02 20:17:02,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:02,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108711867] [2021-05-02 20:17:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108711867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:02,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:02,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:17:02,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864529396] [2021-05-02 20:17:02,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:17:02,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:17:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:17:02,336 INFO L87 Difference]: Start difference. First operand 281 states and 347 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:17:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:02,578 INFO L93 Difference]: Finished difference Result 300 states and 372 transitions. [2021-05-02 20:17:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:17:02,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 20:17:02,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:02,580 INFO L225 Difference]: With dead ends: 300 [2021-05-02 20:17:02,580 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 20:17:02,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:17:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 20:17:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 288. [2021-05-02 20:17:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 176 states have (on average 1.1590909090909092) internal successors, (204), 188 states have internal predecessors, (204), 77 states have call successors, (77), 35 states have call predecessors, (77), 34 states have return successors, (73), 64 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:17:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 354 transitions. [2021-05-02 20:17:02,588 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 354 transitions. Word has length 80 [2021-05-02 20:17:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:02,588 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 354 transitions. [2021-05-02 20:17:02,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:17:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 354 transitions. [2021-05-02 20:17:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:17:02,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:02,589 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] [2021-05-02 20:17:02,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:17:02,805 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -168333139, now seen corresponding path program 8 times [2021-05-02 20:17:02,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:02,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182788229] [2021-05-02 20:17:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:02,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:02,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731678522] [2021-05-02 20:17:02,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:02,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:17:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:17:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:02,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:02,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 20:17:03,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:03,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182788229] [2021-05-02 20:17:03,147 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:03,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731678522] [2021-05-02 20:17:03,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731678522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:03,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:03,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:17:03,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231035912] [2021-05-02 20:17:03,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:17:03,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:17:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:17:03,148 INFO L87 Difference]: Start difference. First operand 288 states and 354 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:17:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:03,430 INFO L93 Difference]: Finished difference Result 297 states and 366 transitions. [2021-05-02 20:17:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:17:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 20:17:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:03,431 INFO L225 Difference]: With dead ends: 297 [2021-05-02 20:17:03,431 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 20:17:03,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:17:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 20:17:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2021-05-02 20:17:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 192 states have internal predecessors, (207), 78 states have call successors, (78), 36 states have call predecessors, (78), 35 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:17:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 359 transitions. [2021-05-02 20:17:03,439 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 359 transitions. Word has length 80 [2021-05-02 20:17:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:03,440 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 359 transitions. [2021-05-02 20:17:03,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:17:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 359 transitions. [2021-05-02 20:17:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:17:03,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:03,441 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] [2021-05-02 20:17:03,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:17:03,657 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash 719170542, now seen corresponding path program 9 times [2021-05-02 20:17:03,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:03,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718636895] [2021-05-02 20:17:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:03,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:03,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092275785] [2021-05-02 20:17:03,663 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 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 [2021-05-02 20:17:03,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:17:03,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:03,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:17:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:03,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:03,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 20:17:04,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:04,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718636895] [2021-05-02 20:17:04,214 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:04,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092275785] [2021-05-02 20:17:04,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092275785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:04,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:04,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:17:04,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980066646] [2021-05-02 20:17:04,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:17:04,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:17:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:17:04,216 INFO L87 Difference]: Start difference. First operand 293 states and 359 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:17:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:08,785 INFO L93 Difference]: Finished difference Result 314 states and 389 transitions. [2021-05-02 20:17:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:17:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 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 80 [2021-05-02 20:17:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:08,787 INFO L225 Difference]: With dead ends: 314 [2021-05-02 20:17:08,787 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 20:17:08,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:17:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 20:17:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 283. [2021-05-02 20:17:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 189 states have internal predecessors, (201), 72 states have call successors, (72), 36 states have call predecessors, (72), 35 states have return successors, (68), 57 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 20:17:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions. [2021-05-02 20:17:08,793 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 80 [2021-05-02 20:17:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:08,793 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions. [2021-05-02 20:17:08,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:17:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions. [2021-05-02 20:17:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:17:08,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:08,794 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] [2021-05-02 20:17:09,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:09,013 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:09,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1072579442, now seen corresponding path program 3 times [2021-05-02 20:17:09,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:09,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736213010] [2021-05-02 20:17:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:09,018 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:09,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924681026] [2021-05-02 20:17:09,018 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 [2021-05-02 20:17:09,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:17:09,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:17:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:09,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-02 20:17:09,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:09,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736213010] [2021-05-02 20:17:09,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:09,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924681026] [2021-05-02 20:17:09,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924681026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:09,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:09,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:17:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029552220] [2021-05-02 20:17:09,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:17:09,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:09,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:17:09,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:17:09,408 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:17:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:09,755 INFO L93 Difference]: Finished difference Result 316 states and 393 transitions. [2021-05-02 20:17:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:17:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-02 20:17:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:09,757 INFO L225 Difference]: With dead ends: 316 [2021-05-02 20:17:09,757 INFO L226 Difference]: Without dead ends: 316 [2021-05-02 20:17:09,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:17:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-02 20:17:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 294. [2021-05-02 20:17:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 196 states have internal predecessors, (210), 75 states have call successors, (75), 37 states have call predecessors, (75), 36 states have return successors, (71), 60 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:17:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2021-05-02 20:17:09,768 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 85 [2021-05-02 20:17:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:09,768 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2021-05-02 20:17:09,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:17:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2021-05-02 20:17:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:17:09,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:09,769 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] [2021-05-02 20:17:09,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:17:09,985 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash -721779505, now seen corresponding path program 10 times [2021-05-02 20:17:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:09,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074333095] [2021-05-02 20:17:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:09,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:09,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532766942] [2021-05-02 20:17:09,990 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 [2021-05-02 20:17:10,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:17:10,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 20:17:10,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:10,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,284 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 20:17:11,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 44 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-05-02 20:17:11,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074333095] [2021-05-02 20:17:11,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532766942] [2021-05-02 20:17:11,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532766942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:11,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:11,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:17:11,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268212857] [2021-05-02 20:17:11,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:17:11,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:17:11,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:17:11,842 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:17:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:28,563 INFO L93 Difference]: Finished difference Result 337 states and 416 transitions. [2021-05-02 20:17:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:17:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 85 [2021-05-02 20:17:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:28,565 INFO L225 Difference]: With dead ends: 337 [2021-05-02 20:17:28,566 INFO L226 Difference]: Without dead ends: 337 [2021-05-02 20:17:28,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1023.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:17:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-02 20:17:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 313. [2021-05-02 20:17:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:17:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 20:17:28,576 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 20:17:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:28,576 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 20:17:28,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:17:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 20:17:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:17:28,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:28,578 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] [2021-05-02 20:17:28,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:17:28,778 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1313119571, now seen corresponding path program 11 times [2021-05-02 20:17:28,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:28,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750180781] [2021-05-02 20:17:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:28,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:28,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659421414] [2021-05-02 20:17:28,786 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 [2021-05-02 20:17:28,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:17:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:17:28,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:28,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-02 20:17:29,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750180781] [2021-05-02 20:17:29,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659421414] [2021-05-02 20:17:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659421414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:29,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:29,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:17:29,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999472975] [2021-05-02 20:17:29,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:17:29,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:17:29,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:17:29,222 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 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) [2021-05-02 20:17:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:29,517 INFO L93 Difference]: Finished difference Result 345 states and 426 transitions. [2021-05-02 20:17:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:17:29,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 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 85 [2021-05-02 20:17:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:29,519 INFO L225 Difference]: With dead ends: 345 [2021-05-02 20:17:29,519 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 20:17:29,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:17:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 20:17:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2021-05-02 20:17:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:17:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 20:17:29,524 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 20:17:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:29,525 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 20:17:29,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 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) [2021-05-02 20:17:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 20:17:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:17:29,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:29,525 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] [2021-05-02 20:17:29,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 20:17:29,741 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash -962319634, now seen corresponding path program 12 times [2021-05-02 20:17:29,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:29,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131861650] [2021-05-02 20:17:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:29,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:29,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063522168] [2021-05-02 20:17:29,745 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 [2021-05-02 20:17:29,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:17:29,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:17:29,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:29,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 20:17:29,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131861650] [2021-05-02 20:17:29,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063522168] [2021-05-02 20:17:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063522168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:29,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:29,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:17:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103137256] [2021-05-02 20:17:29,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:17:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:17:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:17:29,974 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:17:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:32,129 INFO L93 Difference]: Finished difference Result 336 states and 408 transitions. [2021-05-02 20:17:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:17:32,129 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-05-02 20:17:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:32,130 INFO L225 Difference]: With dead ends: 336 [2021-05-02 20:17:32,130 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 20:17:32,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:17:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 20:17:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 306. [2021-05-02 20:17:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 190 states have (on average 1.1210526315789473) internal successors, (213), 206 states have internal predecessors, (213), 75 states have call successors, (75), 41 states have call predecessors, (75), 40 states have return successors, (71), 58 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:17:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 359 transitions. [2021-05-02 20:17:32,136 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 359 transitions. Word has length 85 [2021-05-02 20:17:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:32,136 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 359 transitions. [2021-05-02 20:17:32,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:17:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 359 transitions. [2021-05-02 20:17:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:17:32,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:32,137 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] [2021-05-02 20:17:32,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:32,352 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash -201025847, now seen corresponding path program 13 times [2021-05-02 20:17:32,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:32,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6233906] [2021-05-02 20:17:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:32,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:32,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698949263] [2021-05-02 20:17:32,359 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 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 [2021-05-02 20:17:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:17:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:17:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 20:17:32,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:32,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6233906] [2021-05-02 20:17:32,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:32,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698949263] [2021-05-02 20:17:32,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698949263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:32,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:32,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:17:32,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037929641] [2021-05-02 20:17:32,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:17:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:17:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:17:32,746 INFO L87 Difference]: Start difference. First operand 306 states and 359 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 20:17:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:33,088 INFO L93 Difference]: Finished difference Result 337 states and 411 transitions. [2021-05-02 20:17:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:17:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 90 [2021-05-02 20:17:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:33,089 INFO L225 Difference]: With dead ends: 337 [2021-05-02 20:17:33,090 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 20:17:33,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:17:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 20:17:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 327. [2021-05-02 20:17:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:17:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 20:17:33,097 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 20:17:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:33,097 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 20:17:33,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 20:17:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 20:17:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:17:33,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:33,098 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] [2021-05-02 20:17:33,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 20:17:33,305 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1749274408, now seen corresponding path program 14 times [2021-05-02 20:17:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:33,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184419147] [2021-05-02 20:17:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:33,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:33,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029904949] [2021-05-02 20:17:33,310 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 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 [2021-05-02 20:17:33,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:17:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 20:17:33,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:33,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-02 20:17:33,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:33,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184419147] [2021-05-02 20:17:33,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:33,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029904949] [2021-05-02 20:17:33,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029904949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:33,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:33,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:17:33,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695474564] [2021-05-02 20:17:33,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:17:33,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:17:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:17:33,798 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:17:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:17:34,114 INFO L93 Difference]: Finished difference Result 355 states and 438 transitions. [2021-05-02 20:17:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:17:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2021-05-02 20:17:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:17:34,116 INFO L225 Difference]: With dead ends: 355 [2021-05-02 20:17:34,116 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 20:17:34,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:17:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 20:17:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 327. [2021-05-02 20:17:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:17:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 20:17:34,123 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 20:17:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:17:34,123 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 20:17:34,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:17:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 20:17:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:17:34,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:17:34,124 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] [2021-05-02 20:17:34,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:17:34,341 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:17:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:17:34,341 INFO L82 PathProgramCache]: Analyzing trace with hash 492366858, now seen corresponding path program 15 times [2021-05-02 20:17:34,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:17:34,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123514184] [2021-05-02 20:17:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:17:34,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:17:34,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901245657] [2021-05-02 20:17:34,356 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 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 [2021-05-02 20:17:34,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:17:34,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:17:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:17:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:17:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:34,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:35,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,598 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 20:17:39,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:39,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:17:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 37 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 20:17:40,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:17:40,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123514184] [2021-05-02 20:17:40,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:17:40,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901245657] [2021-05-02 20:17:40,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901245657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:17:40,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:17:40,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:17:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123339238] [2021-05-02 20:17:40,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:17:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:17:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:17:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:17:40,199 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:18:02,480 WARN L205 SmtUtils]: Spent 14.49 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-02 20:18:10,659 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-02 20:18:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:19,926 INFO L93 Difference]: Finished difference Result 389 states and 500 transitions. [2021-05-02 20:18:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:18:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-05-02 20:18:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:19,927 INFO L225 Difference]: With dead ends: 389 [2021-05-02 20:18:19,927 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:18:19,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 25894.0ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-02 20:18:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:18:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:18:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:18:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:18:19,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-05-02 20:18:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:19,928 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:18:19,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:18:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:18:19,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:18:20,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 20:18:20,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:20 BasicIcfg [2021-05-02 20:18:20,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:18:20,133 INFO L168 Benchmark]: Toolchain (without parser) took 97136.97 ms. Allocated memory was 176.2 MB in the beginning and 332.4 MB in the end (delta: 156.2 MB). Free memory was 141.2 MB in the beginning and 256.1 MB in the end (delta: -114.8 MB). Peak memory consumption was 42.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 176.2 MB. Free memory is still 158.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.89 ms. Allocated memory is still 176.2 MB. Free memory was 141.0 MB in the beginning and 159.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L168 Benchmark]: Boogie Preprocessor took 19.44 ms. Allocated memory is still 176.2 MB. Free memory was 159.9 MB in the beginning and 158.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L168 Benchmark]: RCFGBuilder took 203.74 ms. Allocated memory is still 176.2 MB. Free memory was 158.4 MB in the beginning and 142.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L168 Benchmark]: IcfgTransformer took 31.05 ms. Allocated memory is still 176.2 MB. Free memory was 142.2 MB in the beginning and 141.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L168 Benchmark]: TraceAbstraction took 96687.84 ms. Allocated memory was 176.2 MB in the beginning and 332.4 MB in the end (delta: 156.2 MB). Free memory was 140.6 MB in the beginning and 256.1 MB in the end (delta: -115.5 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:20,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 176.2 MB. Free memory is still 158.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 189.89 ms. Allocated memory is still 176.2 MB. Free memory was 141.0 MB in the beginning and 159.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.44 ms. Allocated memory is still 176.2 MB. Free memory was 159.9 MB in the beginning and 158.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 203.74 ms. Allocated memory is still 176.2 MB. Free memory was 158.4 MB in the beginning and 142.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 31.05 ms. Allocated memory is still 176.2 MB. Free memory was 142.2 MB in the beginning and 141.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 96687.84 ms. Allocated memory was 176.2 MB in the beginning and 332.4 MB in the end (delta: 156.2 MB). Free memory was 140.6 MB in the beginning and 256.1 MB in the end (delta: -115.5 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 96647.3ms, OverallIterations: 31, TraceHistogramMax: 12, EmptinessCheckTime: 27.4ms, AutomataDifference: 72468.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1258 SDtfs, 757 SDslu, 6621 SDs, 0 SdLazy, 7095 SolverSat, 707 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 48674.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1996 GetRequests, 1634 SyntacticMatches, 12 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 29797.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=327occurred in iteration=29, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 238.0ms AutomataMinimizationTime, 31 MinimizatonAttempts, 312 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 309.2ms SsaConstructionTime, 2100.3ms SatisfiabilityAnalysisTime, 13964.5ms InterpolantComputationTime, 1942 NumberOfCodeBlocks, 1810 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1911 ConstructedInterpolants, 2 QuantifiedInterpolants, 12270 SizeOfPredicates, 151 NumberOfNonLiveVariables, 6082 ConjunctsInSsa, 936 ConjunctsInUnsatCore, 31 InterpolantComputations, 5 PerfectInterpolantSequences, 3162/4000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...