/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/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:00:06,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:00:06,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:00:06,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:00:06,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:00:06,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:00:06,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:00:06,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:00:06,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:00:06,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:00:06,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:00:06,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:00:06,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:00:06,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:00:06,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:00:06,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:00:06,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:00:06,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:00:06,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:00:06,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:00:06,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:00:06,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:00:06,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:00:06,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:00:06,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:00:06,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:00:06,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:00:06,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:00:06,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:00:06,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:00:06,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:00:06,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:00:06,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:00:06,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:00:06,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:00:06,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:00:06,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:00:06,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:00:06,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:00:06,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:00:06,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:00:06,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:00:06,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:00:06,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:00:06,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:00:06,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:00:06,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:00:06,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:00:06,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:00:06,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:00:06,471 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:00:06,471 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:00:06,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:00:06,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:00:06,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:00:06,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:00:06,776 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:00:06,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-06 10:00:06,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e90c66c/fc7dbfd42c8448f8a320e3a2c2c85c25/FLAG7d523150c [2021-05-06 10:00:07,145 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:00:07,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-06 10:00:07,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e90c66c/fc7dbfd42c8448f8a320e3a2c2c85c25/FLAG7d523150c [2021-05-06 10:00:07,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e90c66c/fc7dbfd42c8448f8a320e3a2c2c85c25 [2021-05-06 10:00:07,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:00:07,587 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:00:07,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:00:07,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:00:07,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:00:07,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ebe1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07, skipping insertion in model container [2021-05-06 10:00:07,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:00:07,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:00:07,840 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/prodbin-ll_unwindbound10.c[537,550] [2021-05-06 10:00:07,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:00:07,871 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:00:07,897 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/prodbin-ll_unwindbound10.c[537,550] [2021-05-06 10:00:07,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:00:07,934 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:00:07,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07 WrapperNode [2021-05-06 10:00:07,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:00:07,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:00:07,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:00:07,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:00:07,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... [2021-05-06 10:00:07,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:00:07,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:00:07,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:00:07,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:00:07,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:00:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:00:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:00:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:00:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:00:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:00:08,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:00:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:00:08,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:00:08,143 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:00:08,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:00:08,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:00:08,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:00:08,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:00:08,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:00:08,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:00:08,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:00:08,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:00:08,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:00:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:00:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:00:08,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:00:08,371 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:00:08,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:00:08 BoogieIcfgContainer [2021-05-06 10:00:08,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:00:08,372 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:00:08,373 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:00:08,373 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:00:08,375 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:00:08" (1/1) ... [2021-05-06 10:00:08,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:00:08 BasicIcfg [2021-05-06 10:00:08,383 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:00:08,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:00:08,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:00:08,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:00:08,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:00:07" (1/4) ... [2021-05-06 10:00:08,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d16910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:00:08, skipping insertion in model container [2021-05-06 10:00:08,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:00:07" (2/4) ... [2021-05-06 10:00:08,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d16910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:00:08, skipping insertion in model container [2021-05-06 10:00:08,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:00:08" (3/4) ... [2021-05-06 10:00:08,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d16910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:00:08, skipping insertion in model container [2021-05-06 10:00:08,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:00:08" (4/4) ... [2021-05-06 10:00:08,409 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.cJordan [2021-05-06 10:00:08,412 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:00:08,414 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:00:08,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:00:08,453 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:00:08,453 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:00:08,453 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:00:08,453 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:00:08,453 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:00:08,453 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:00:08,454 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:00:08,454 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:00:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:00:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:00:08,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:08,495 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:08,495 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-06 10:00:08,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:08,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297462098] [2021-05-06 10:00:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:08,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:00:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:08,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:00:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:08,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:08,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297462098] [2021-05-06 10:00:08,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297462098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:08,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:08,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:00:08,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644496468] [2021-05-06 10:00:08,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:00:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:00:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:00:08,755 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:08,827 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-06 10:00:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:00:08,829 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:00:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:08,834 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:00:08,834 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:00:08,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:00:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:00:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 10:00:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:00:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 10:00:08,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 10:00:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:08,856 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 10:00:08,856 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 10:00:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:00:08,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:08,856 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:08,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:00:08,857 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-06 10:00:08,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:08,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026254043] [2021-05-06 10:00:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:08,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:08,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949083764] [2021-05-06 10:00:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:08,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:00:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:08,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:09,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:09,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026254043] [2021-05-06 10:00:09,056 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:09,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949083764] [2021-05-06 10:00:09,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949083764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:09,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:09,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:00:09,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778805475] [2021-05-06 10:00:09,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:00:09,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:00:09,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:00:09,059 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:00:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:09,068 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-06 10:00:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:00:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:00:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:09,069 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:00:09,069 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:00:09,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:00:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:00:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:00:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:00:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 10:00:09,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-06 10:00:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:09,073 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 10:00:09,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:00:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 10:00:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:00:09,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:09,074 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:09,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:00:09,291 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-06 10:00:09,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:09,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754817050] [2021-05-06 10:00:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:09,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:09,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94547004] [2021-05-06 10:00:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:09,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:00:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:09,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:09,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:09,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754817050] [2021-05-06 10:00:09,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:09,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94547004] [2021-05-06 10:00:09,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94547004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:09,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:09,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:00:09,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438633316] [2021-05-06 10:00:09,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:00:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:00:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:00:09,444 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:09,486 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:00:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:00:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:00:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:09,487 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:00:09,487 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:00:09,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:00:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:00:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 10:00:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:00:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:00:09,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:00:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:09,491 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:00:09,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:00:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:00:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:00:09,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:09,492 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:09,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:09,709 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2021-05-06 10:00:09,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:09,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872993289] [2021-05-06 10:00:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:09,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:09,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739703490] [2021-05-06 10:00:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:00:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:09,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:09,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872993289] [2021-05-06 10:00:09,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:09,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739703490] [2021-05-06 10:00:09,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739703490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:00:09,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:00:09,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:00:09,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301477984] [2021-05-06 10:00:09,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:00:09,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:00:09,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:00:09,892 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:09,925 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-06 10:00:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:00:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:00:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:09,926 INFO L225 Difference]: With dead ends: 35 [2021-05-06 10:00:09,926 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 10:00:09,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:00:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 10:00:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-06 10:00:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:00:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 10:00:09,929 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2021-05-06 10:00:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:09,929 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 10:00:09,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 10:00:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:00:09,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:09,930 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:10,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:10,149 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-06 10:00:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:10,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787966662] [2021-05-06 10:00:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:10,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:10,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099248187] [2021-05-06 10:00:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:00:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:10,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:10,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:10,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787966662] [2021-05-06 10:00:10,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:10,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099248187] [2021-05-06 10:00:10,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099248187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:00:10,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:00:10,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:00:10,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082598739] [2021-05-06 10:00:10,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:00:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:00:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:00:10,381 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:00:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:10,402 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-06 10:00:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:00:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:00:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:10,403 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:00:10,403 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:00:10,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:00:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:00:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 10:00:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:00:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-06 10:00:10,406 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-06 10:00:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:10,406 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-06 10:00:10,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:00:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-06 10:00:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:00:10,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:10,407 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:10,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:10,626 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-06 10:00:10,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:10,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143028661] [2021-05-06 10:00:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:10,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:10,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378088191] [2021-05-06 10:00:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:10,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:00:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:10,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143028661] [2021-05-06 10:00:10,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378088191] [2021-05-06 10:00:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378088191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:00:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:00:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:00:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134285811] [2021-05-06 10:00:10,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:00:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:00:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:00:10,928 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:11,112 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-06 10:00:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:00:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 10:00:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:11,113 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:00:11,113 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:00:11,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:00:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:00:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-06 10:00:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:00:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-06 10:00:11,117 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-06 10:00:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-06 10:00:11,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-06 10:00:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:00:11,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:11,118 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:00:11,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:00:11,329 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-06 10:00:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:11,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615730450] [2021-05-06 10:00:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:11,340 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:11,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009480419] [2021-05-06 10:00:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:11,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:00:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:11,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:00:11,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:11,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615730450] [2021-05-06 10:00:11,589 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:11,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009480419] [2021-05-06 10:00:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009480419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:00:11,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:00:11,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:00:11,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085993533] [2021-05-06 10:00:11,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:00:11,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:11,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:00:11,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:00:11,591 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:00:11,673 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-06 10:00:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:00:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 10:00:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:00:11,675 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:00:11,676 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 10:00:11,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:00:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 10:00:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-06 10:00:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:00:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-06 10:00:11,679 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-06 10:00:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:00:11,679 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-06 10:00:11,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:00:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-06 10:00:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:00:11,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:00:11,680 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 10:00:11,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:11,897 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:00:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:00:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-06 10:00:11,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:00:11,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165429612] [2021-05-06 10:00:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:00:11,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:00:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956697417] [2021-05-06 10:00:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:00:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:00:12,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 10:00:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:00:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:00:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:00:12,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:00:12,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165429612] [2021-05-06 10:00:12,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:00:12,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956697417] [2021-05-06 10:00:12,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956697417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:00:12,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:00:12,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:00:12,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381102678] [2021-05-06 10:00:12,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:00:12,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:00:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:00:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:00:12,109 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)