/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/hard-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:58:29,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:58:29,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:58:29,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:58:29,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:58:29,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:58:29,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:58:29,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:58:29,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:58:29,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:58:29,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:58:29,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:58:29,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:58:29,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:58:29,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:58:29,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:58:29,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:58:30,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:58:30,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:58:30,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:58:30,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:58:30,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:58:30,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:58:30,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:58:30,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:58:30,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:58:30,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:58:30,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:58:30,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:58:30,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:58:30,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:58:30,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:58:30,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:58:30,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:58:30,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:58:30,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:58:30,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:58:30,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:58:30,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:58:30,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:58:30,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:58:30,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:58:30,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:58:30,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:58:30,059 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:58:30,059 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:58:30,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:58:30,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:58:30,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:58:30,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:58:30,427 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:58:30,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2021-05-06 08:58:30,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2582544e/fef6f19797314fdfb332231c1189dbfd/FLAG516480f2f [2021-05-06 08:58:30,875 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:58:30,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2021-05-06 08:58:30,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2582544e/fef6f19797314fdfb332231c1189dbfd/FLAG516480f2f [2021-05-06 08:58:30,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2582544e/fef6f19797314fdfb332231c1189dbfd [2021-05-06 08:58:30,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:58:30,908 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:58:30,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:58:30,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:58:30,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:58:30,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:58:30" (1/1) ... [2021-05-06 08:58:30,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d62a514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:30, skipping insertion in model container [2021-05-06 08:58:30,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:58:30" (1/1) ... [2021-05-06 08:58:30,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:58:30,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:58:31,101 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/hard-u_unwindbound100.c[545,558] [2021-05-06 08:58:31,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:58:31,125 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:58:31,136 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/hard-u_unwindbound100.c[545,558] [2021-05-06 08:58:31,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:58:31,154 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:58:31,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31 WrapperNode [2021-05-06 08:58:31,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:58:31,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:58:31,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:58:31,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:58:31,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:58:31,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:58:31,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:58:31,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:58:31,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:58:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:58:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:58:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:58:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:58:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:58:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:58:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:58:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:58:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:58:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:58:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:58:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:58:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:58:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:58:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:58:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:58:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:58:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:58:31,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:58:31,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:58:31,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:58:31,512 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:58:31,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:31 BoogieIcfgContainer [2021-05-06 08:58:31,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:58:31,514 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:58:31,514 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:58:31,515 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:58:31,518 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:31" (1/1) ... [2021-05-06 08:58:31,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:58:31 BasicIcfg [2021-05-06 08:58:31,532 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:58:31,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:58:31,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:58:31,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:58:31,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:58:30" (1/4) ... [2021-05-06 08:58:31,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d13ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:58:31, skipping insertion in model container [2021-05-06 08:58:31,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:31" (2/4) ... [2021-05-06 08:58:31,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d13ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:58:31, skipping insertion in model container [2021-05-06 08:58:31,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:31" (3/4) ... [2021-05-06 08:58:31,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d13ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:58:31, skipping insertion in model container [2021-05-06 08:58:31,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:58:31" (4/4) ... [2021-05-06 08:58:31,539 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.cJordan [2021-05-06 08:58:31,544 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:58:31,547 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:58:31,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:58:31,579 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:58:31,579 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:58:31,579 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:58:31,579 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:58:31,580 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:58:31,580 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:58:31,580 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:58:31,580 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:58:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:58:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:58:31,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:31,598 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 08:58:31,599 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:58:31,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911971979] [2021-05-06 08:58:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:31,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:31,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:31,925 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 08:58:31,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:31,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911971979] [2021-05-06 08:58:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911971979] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:31,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:31,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:58:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242485849] [2021-05-06 08:58:31,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:58:31,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:58:31,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:58:31,947 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:58:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:32,100 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:58:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:58:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:58:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:32,111 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:58:32,111 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:58:32,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:58:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:58:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:58:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:58:32,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:58:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:32,143 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:58:32,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:58:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:58:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:58:32,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:32,145 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 08:58:32,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:58:32,145 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:58:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:32,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217232054] [2021-05-06 08:58:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:32,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:32,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:32,322 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 08:58:32,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:32,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217232054] [2021-05-06 08:58:32,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217232054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:32,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:32,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:32,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398599398] [2021-05-06 08:58:32,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:32,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:32,328 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 08:58:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:32,614 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:58:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:58:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2021-05-06 08:58:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:32,617 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:58:32,618 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:58:32,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:58:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:58:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:58:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:58:32,636 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:58:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:32,637 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:58:32,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 08:58:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:58:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:58:32,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:32,640 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:32,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:58:32,642 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:58:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:32,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308662030] [2021-05-06 08:58:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:32,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:32,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453106972] [2021-05-06 08:58:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:58:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:32,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:32,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:32,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:32,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:32,884 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 08:58:32,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:32,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308662030] [2021-05-06 08:58:32,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:32,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453106972] [2021-05-06 08:58:32,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453106972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:32,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:32,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:58:32,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471669285] [2021-05-06 08:58:32,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:58:32,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:58:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:58:32,887 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 08:58:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:32,900 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:58:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:58:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2021-05-06 08:58:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:32,902 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:58:32,902 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:58:32,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:58:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:58:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:58:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:58:32,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:58:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:32,912 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:58:32,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 08:58:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:58:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:58:32,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:32,913 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] [2021-05-06 08:58:33,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:58:33,139 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:33,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:58:33,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:33,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599207673] [2021-05-06 08:58:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:33,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:33,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:58:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:33,282 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 08:58:33,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:33,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599207673] [2021-05-06 08:58:33,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599207673] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:33,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:33,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:33,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887188425] [2021-05-06 08:58:33,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:33,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:33,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:33,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:33,285 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:58:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:33,577 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:58:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:58:33,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:58:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:33,580 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:58:33,580 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:58:33,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:58:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:58:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:58:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:58:33,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:58:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:33,589 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:58:33,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:58:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:58:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:58:33,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:33,591 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:33,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:58:33,591 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:58:33,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:33,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552663749] [2021-05-06 08:58:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:33,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:33,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50714456] [2021-05-06 08:58:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:33,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:33,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:58:33,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:33,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552663749] [2021-05-06 08:58:33,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:33,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50714456] [2021-05-06 08:58:33,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50714456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:33,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:33,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:58:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730704275] [2021-05-06 08:58:33,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:33,829 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:58:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:36,073 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-05-06 08:58:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:58:36,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:58:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:36,074 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:58:36,074 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:58:36,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:58:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:58:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:58:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 08:58:36,080 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 08:58:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:36,080 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 08:58:36,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:58:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 08:58:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:58:36,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:36,081 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:36,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:36,307 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:58:36,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:36,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12349798] [2021-05-06 08:58:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:36,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:36,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141848954] [2021-05-06 08:58:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:36,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:36,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:36,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:36,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12349798] [2021-05-06 08:58:36,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:36,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141848954] [2021-05-06 08:58:36,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141848954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:36,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:36,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:58:36,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426573214] [2021-05-06 08:58:36,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:36,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:36,547 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:36,601 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-06 08:58:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:58:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:58:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:36,604 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:58:36,604 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:58:36,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:58:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:58:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:58:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 08:58:36,623 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 08:58:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:36,624 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 08:58:36,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 08:58:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:58:36,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:36,625 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:36,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:36,826 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:36,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:58:36,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:36,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282452676] [2021-05-06 08:58:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:36,834 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:36,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869821040] [2021-05-06 08:58:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:58:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:37,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:37,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282452676] [2021-05-06 08:58:37,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869821040] [2021-05-06 08:58:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869821040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:37,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:37,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:37,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215764016] [2021-05-06 08:58:37,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:37,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:37,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:37,082 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:58:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:37,319 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-05-06 08:58:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:58:37,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:58:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:37,321 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:58:37,321 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 08:58:37,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:58:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 08:58:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 08:58:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:58:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 08:58:37,326 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 08:58:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:37,327 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 08:58:37,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:58:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 08:58:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:58:37,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:37,328 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:37,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:37,533 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:58:37,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:37,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470535716] [2021-05-06 08:58:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:37,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:37,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5781026] [2021-05-06 08:58:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:37,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:37,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470535716] [2021-05-06 08:58:37,723 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5781026] [2021-05-06 08:58:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5781026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:37,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:37,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:58:37,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347752336] [2021-05-06 08:58:37,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:37,725 INFO L87 Difference]: Start difference. First operand 78 states and 93 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, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:37,791 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-05-06 08:58:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:58:37,792 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, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:58:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:37,794 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:58:37,794 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:58:37,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:58:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 08:58:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:58:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 08:58:37,800 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 08:58:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:37,800 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 08:58:37,800 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, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 08:58:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:58:37,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:37,801 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:38,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:38,027 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:58:38,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:38,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620009976] [2021-05-06 08:58:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:38,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:38,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104686098] [2021-05-06 08:58:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:58:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:38,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:58:38,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:38,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620009976] [2021-05-06 08:58:38,327 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:38,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104686098] [2021-05-06 08:58:38,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104686098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:38,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:38,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:58:38,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007490069] [2021-05-06 08:58:38,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:38,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:38,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:38,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:38,329 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:58:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:40,635 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:58:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:58:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:58:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:40,637 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:58:40,637 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:58:40,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:58:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:58:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 08:58:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:58:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 08:58:40,643 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 08:58:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:40,644 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 08:58:40,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:58:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 08:58:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:58:40,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:40,645 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:40,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:40,851 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:40,851 INFO L82 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2021-05-06 08:58:40,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:40,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599485323] [2021-05-06 08:58:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:40,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:40,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772558441] [2021-05-06 08:58:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:58:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:40,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:41,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:41,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:58:41,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599485323] [2021-05-06 08:58:41,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772558441] [2021-05-06 08:58:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772558441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:41,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:41,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:58:41,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534617340] [2021-05-06 08:58:41,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:41,042 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:58:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:41,143 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-05-06 08:58:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:58:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 08:58:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:41,145 INFO L225 Difference]: With dead ends: 115 [2021-05-06 08:58:41,145 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 08:58:41,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:58:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 08:58:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 08:58:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:58:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-05-06 08:58:41,152 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 50 [2021-05-06 08:58:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:41,152 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-05-06 08:58:41,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:58:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-05-06 08:58:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:58:41,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:41,153 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:41,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:58:41,365 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2021-05-06 08:58:41,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:41,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392562209] [2021-05-06 08:58:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:41,374 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:41,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064977811] [2021-05-06 08:58:41,374 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